Back 20 (ахыԥхьаӡара) Abkhazian Zwanzig ALS 20 (عدد) Arabic 20 ARY 20 (ədəd) Azerbaijani ۲۰ (سایی) AZB 20 (angka) BAN 20 (число) Bulgarian ২০ (সংখ্যা) Bengali/Bangla ༢༠ (གྲངས་ཀ།) Tibetan
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| Cardinal | twenty | |||
| Ordinal | 20th (twentieth) | |||
| Numeral system | vigesimal | |||
| Factorization | 22 × 5 | |||
| Divisors | 1, 2, 4, 5, 10, 20 | |||
| Greek numeral | Κ´ | |||
| Roman numeral | XX | |||
| Binary | 101002 | |||
| Ternary | 2023 | |||
| Senary | 326 | |||
| Octal | 248 | |||
| Duodecimal | 1812 | |||
| Hexadecimal | 1416 | |||
| Armenian | Ի | |||
| Hebrew | כ / ך | |||
| Babylonian numeral | ⟪ | |||
| Egyptian hieroglyph | 𓎏 | |||
20 (twenty) is the natural number following 19 and preceding 21.
A group of twenty units may be referred to as a score.[1][2]
- ^ John H. Conway and Richard K. Guy, The Book of Numbers. New York: Copernicus (1996): 11. ""Score" is related to "share" and comes from the Old Norse "skor" meaning a "notch" or "tally" on a stick used for counting. ... Often people counted in 20s; every 20th notch was larger, so "score" also came to mean 20."
- ^ "score | Origin and meaning of score by Online Etymology Dictionary". www.etymonline.com. Retrieved 2020-08-16.