16 (NUMBER)

:''"Sixteen" redirects here. For other uses, see Sixteen (disambiguation)''

16	10	6

'16' ('sixteen') is the natural number following 15 and preceding 17.

Cardinal	16 sixteen
Ordinal	16th sixteenth
Numeral system	hexadecimal
Factorization	$2^4\; ,!$
Divisors	1, 2, 4, 8, 16
Roman numeral	XVI
Roman numeral (Unicode)	XVI, xvi
Binary	10000
Octal	20
Duodecimal	14
Hexadecimal	10
Hebrew	ט"ז (Tet Zayin)

Contents

In mathematics

Age 16

Sports

In other fields

References

In mathematics

Sixteen is a composite number, and a square number, being 4² = 4 × 4. It is the tiniest number with exactly five divisors, its proper divisors being , , and . As a power of 2 it has an aliquot sum one less than itself; 15, and is the fifth composite member of the 3-aliquot tree having the 7 member aliquot sequence (16,15,9,4,3,1,0).
It is the fourth power of two. For this reason, 16 was used in weighing light objects in several cultures. The British used to have 16 ounces in one pound, the Chinese used to have 16 langs in one jin. In old days, weighing was done with a beam balance to make equal splits. It would be easier to split a heap of grains into sixteen equal parts through successive divisions than to split into ten parts. Chinese Taoists did finger computation on the trigrams and hexagrams by counting the finger tips and joints of the fingers with the tip of the thumb. Each hand can count up to 16 in such manner. The Chinese abacus uses two upper beads to represent the 5's and 5 lower beads to represent the 1's, the 7 beads can represent from a hexadecimal digit from 0 to 15 in each column.
Sixteen is the only integer that equals $m^n$ and $n^m$, for some unequal integral ''m'' and ''n'' (''m''=4, ''n''=2, or vice versa). It has this property because $2^2=2\; imes2$. It is also equal to 2↑↑3, (using Knuth's up-arrow notation).
15 and 16 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur.
16 is a centered pentagonal number.
16 is the base of the hexadecimal number system, which is used extensively in computer science.

Age 16

★ Sixteen is the minimum age for being allowed an official driver's license in many U.S. states and in Canada. In Australia it is the age one can begin to get a learner's licence.

★ Sixteen is the minimum age for getting an adult job in most states and provinces (as well as, complementarily, for dropping out of school).

★ In America, female sixteen year olds earn the right to privacy laws surrounding OBGYN practices.

★ In the Netherlands it is the legal minimum age for a person to purchase any tobacco product.

★ Sixteen is the age of consent for many jurisdictions around the world.

★ For its "coming of age" signification, this age has inspired the titles of many songs, such as "''Happy Birthday Sweet Sixteen''", "''You're Sixteen, You're Beautiful, You're Mine''", "''Sweet Sixteen''", "''Sweet Little Sixteen''" and "''Sixteen Candles''", the last of which was borrowed as the title of a John Hughes movie. (This last one was also parodied in a novelty song by The Mothers, titled "Eddie Are You Kidding?", a tribute to the Los Angeles clothing store Zachary All; the tag line is "Sixteen Tailors...")

★ Sixteen is the minimum age to get married with parental consent in many countries.

★ Sixteen is the legal drinking age in France, Germany, Austria, The Netherlands, Spain and Portugal.

★ In The Netherlands sixteen is the age when all adult rights are granted but the age of majority is 18.

Sports

★ 16 is the retired number of former baseball pitchers Whitey Ford and Hal Newhouser.

★ 16 was the jersey number of Manchester United's most successful ever captain Roy Keane, it is now worn by £18.6 million signing Michael Carrick.

★ 16 is the jersey number of former football quarterback Joe Montana.

★ The number 16 is retired by the St. Louis Blues in honor of Brett Hull.

★ 16 is the number worn by former Boston Bruins stars Derek Sanderson (1967-75) and Rick Middleton (1976-88).

In other fields

★ The Roman Catholic Pope is Pope Benedict XVI (16).

★ There are sixteen ounces in an avoirdupois pound.

★ There are sixteen pawns in a chess set and each player in a chess game starts with sixteen pieces


★ "The Sixteen" is an English choir performing early religious music.

★ Sixteen is a Polish band that represented Poland in the 1998 Eurovision Song Contest.

★ Greg Biffle's NASCAR Nextel Cup car number.

★ The Cadillac Sixteen.

★ There are sixteen different personality types in the Myers-Briggs classification system.

★ A note played for one-sixteenth the duration of a whole note is called a sixteenth note or a semiquaver.

★ In the 16-bit era, 16-bit microprocessor ran 16-bit applications.

★ Sixteen Kingdoms, part of Chinese history.

★ Canada's Yellowhead Highway is designated as Highway 16.

★ Interstate 16 is the designation for a US interstate highway in Georgia.

★ The fighter jet, the F-16 Fighting Falcon.

★ 16 mm film was originally an amateur movie format, but is now used by professionals.

★ 16 is one of the "Lost Numbers" on the television show ''Lost'', along with 4, 8, 15, 23, and 42.

★ 16 is a song by Green Day on their album 39/Smooth.

★ The M16 rifle.

★ The number 16 is the symbol of the Day of solidarity with political prisoners and victims of the Lukashenka regime in Belarus, which is commemorated on 16th of every months by demonstrations and flash mobs worldwide.

★ In tarot, card No. 16 is "the Tower".

★ There are sixteen main characters in the novel The Westing Game

★ A sixteen is a slang term for a verse in a hip hop song, which are often written in sixteen-bar stanzas.^[1]

★ The code used on BC Ferries to inform staff that they are approaching a ferry terminal

★ Android 16 of the Dragonball Z television series.

★ The amount of waking hours in a day in an "8 hours of sleep" schedule.

★ In the story of the Sleeping Beauty, a spell is placed on the princess that when she reaches her 16th birthday, she will "prick her finger on the spindle of a spinning wheel and die."

References

1. Lesson plan explaining the reasoning behind the hip-hop slang "sixteen"