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20 ( twenty; Roman numeral XX) is the natural number following 19 and preceding 21. A group of twenty units may be referred to as a score. [1] [2] Mathematics. Integer properties. Twenty is a pronic number, as it is the product of consecutive integers, namely 4 and 5. [3] .
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Look up twenty in Wiktionary, the free dictionary. Twenty or 20 may refer to: 20 (number), the natural number following 19 and preceding 21. one of the years 20 BC, AD 20, 1920, 2020.
The United States twenty-dollar bill ($20) is a denomination of U.S. currency. A portrait of Andrew Jackson, the seventh U.S. president (1829–1837), has been featured on the obverse of the bill since 1928; the White House is featured on the reverse.
- 66.3 mm
- c. 1.0 g
- $20
- 156 mm
This Friday marks 20 years of Wikipedia. Join us for a special #Wikipedia20 event that day, celebrating the idea that knowledge can be shared by and open to everyone
20 (number) - Simple English Wikipedia, the free encyclopedia. Twenty is the number that is after nineteen and before twenty-one . The prime factors of twenty are 2 and 5. (2 * 2 * 5 = 20) Its factors are: 1, 2, 4, 5, 10, and 20. As the sum of its factors is more than itself (i.e. 22), it can be referred to as an abundant number .
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