16 (number)

XVI 16 (disambiguation) March 2025 16 hexadecimal 1, 2, 4, 8, 16 Hebrew numeral ט"ז / י"ו Babylonian numeral 𒌋𒐚 16 (sixteen) is the natural number following 15 and preceding 17. It is the fourth power of two. Mathematics 16 is the ninth composite number, and a square number: 42 = 4 × 4. It is the first fourth-power prime of the form p4: 16 = 24. It is the smallest number with exactly five divisors: 1, 2, 4, 8, and 16. Sixteen is the only integer that equals mn and nm, for some unequal integers m and n (, , or vice versa). David Wells The Penguin Dictionary of Curious and Interesting Numbers Penguin Books 1987 93 It has this property because . It is also equal to 32 (see tetration). The aliquot sum of 16 is 15, within an aliquot sequence of four composite members (16, 15, 9, 4, 3, 1, 0) that belong to the prime 3-aliquot tree. Sixteen is the largest known integer n, for which is prime. There are sixteen partially ordered sets with four unlabeled elements.A000112 Number of partially ordered sets (posets) with n unlabeled elements Sixteen is the first Erdős–Woods number.https://oeis.org/A059756 Sloane's A059756 : Erdős–Woods numbers The On-Line Encyclopedia of Integer Sequences OEIS Foundation 2020-12-04 Sixteen is the only number that can be both the perimeter and area of the same square, due to being equal to The sedenions form a 16-dimensional hypercomplex number system. Hexadecimal Sixteen is the base of the hexadecimal number system, which is used extensively in computer science. Technology In some computer programming languages, the size in bits of certain data types, such as in 16-bit computing. In the 16-bit era, 16-bit microprocessor ran 16-bit applications. A 16-bit integer can represent up to 65,536 values. Culture As a unit of measurement A low power of two, 16 was used in weighing light objects in several cultures. Early civilizations utilized the weighing scale as a means to measure mass, which made splitting resources into equal parts a simple task.Morley Iain The Archaeology of Measurement: Comprehending Heaven, Earth and Time in Ancient Societies Renfrew Colin Cambridge University Press 2010 9780511760822 88–105Petruso Karl M. 1981 Early Weights and Weighing in Egypt and the Indus Valley https://www.jstor.org/stable/4171634 M Bulletin (Museum of Fine Arts, Boston) 79 44–51 4171634 0739-5736 In the imperial system, 16 ounces equivalates to one pound. Until the State Council of the People's Republic of China decreed a decimal conversion for currency in 1959,(in Chinese) 1959 Gazette of the State Council of the People's Republic of China https://www.gov.cn/zwgk/2011-11/09/content_1988933.htm 2024-11-01 gov.cn China equivalated 16 liǎng to one jīn. 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 5s and 5 lower beads to represent the 1s, the 7 beads can represent a hexadecimal digit from 0 to 15 in each column. Age 16 A "sweet sixteen" is celebrated by many sixteen-year-old girls in the United States and Canada. It is a coming-of-age celebration that traditionally marks a girl's transition into womanhood. In the United States and Canada, 16 is the most common age of sexual consent, as well as the age in the United Kingdom and several European countries.http://www.age-of-consent.info/ https://web.archive.org/web/20110417024317/http://www.age-of-consent.info/ dead 2011-04-17 Age of Consent By Statehttp://www.avert.org/age-of-consent.htm Age of consent for sexual intercourse Avert https://web.archive.org/web/20110422181758/http://www.avert.org/age-of-consent.htm dead 2011-04-22 Sixteen is also the minimum age for being allowed a beginner's driver's license with parental consent in many US states and in Canada. References External links sixteen 16 xy = yx Sweet Sixteen http://www.numberphile.com/videos/16.html Numberphile Brady Haran Symonds, Ria Parker, Matt 1 April 2013 https://web.archive.org/web/20130531070536/http://numberphile.com/videos/16.html 31 May 2013 dead zero Category:Integers