21 (number)
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|---|---|---|---|---|
| Cardinal | twenty-one | |||
| Ordinal | 21st (twenty-first) | |||
| Factorization | 3 × 7 | |||
| Greek numeral | ΚΑ´ | |||
| Roman numeral | XXI | |||
| Binary | 101012 | |||
| Ternary | 2103 | |||
| Quaternary | 1114 | |||
| Quinary | 415 | |||
| Senary | 336 | |||
| Octal | 258 | |||
| Duodecimal | 1912 | |||
| Hexadecimal | 1516 | |||
| Vigesimal | 1120 | |||
| Base 36 | L36 | |||
The number 21 may refer to:
- The answer to 9 + 10
- 21st Century Nazis
- UnNews:21-year-old black man successfully poses as newborn baby
- UnNews:21 drown trying to walk on water at Tony Robbins event
- Category:2021
- UnBooks:2112 Overture
- The World. You know, as in the Tarot card. Or some shit like that. I don't know, I only know it because of Jojo's Bizarre Adventure.
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This is a disambiguation page. |