Names of 20561
| Nominal | 20561 |
| Cardinal | twenty thousand five hundred sixty-one |
| Ordinal | 20,561st |
| This number as US currency | twenty thousand five hundred sixty-one dollars |
| Is 20561 an odd number? | 20561 is an odd number |
| Is 20561 an even number? | 20561 is NOT an even number |
| Is 20561 a palindrome? | 20561 is NOT a palindrome number |
| Is 20561 a triangle number? | 20561 is NOT a triangle number |
20561 in other Bases
| Base 2 (Binary) | 1010000010100012 |
| Base 3 (Ternary) | 10010121123 |
| Base 4 (Quaternary) | 110011014 |
| Base 5 (Quinary) | 11242215 |
| Base 6 (Senary) | 2351056 |
| Base 8 (Octal) | 501218 |
| Base 12 (Duodecimal) | BA9512 |
| Base 16 (Hexadecimal) | 505116 |
| Base 20 (Vigesimal) | 2B8120 |
Primes and Factors tests for 20561
| Is 20561 a Prime Number? | 20561 is NOT a prime |
| Is 20561 a perfect number? | 20561 is NOT a perfect number |
| Is 20561 a Mersenne Prime? | 20561 is NOT a Mersenne prime |
| Is 20561 a Fermat Prime? | 20561 is NOT a Fermat prime |
| Is 20561 a Fibonacci Prime? | 20561 is NOT a Fibonacci prime |
| Is 20561 a Partition Prime? | 20561 is NOT a Partition prime |
| Is 20561 a Pell Prime? | 20561 is NOT a Pell prime |
| Prime Factors | Prime factors of 20561 |
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20561 in other Numerals
| 20561 in Roman Numeral | XXDLXI |
| 20561 in Chinese Numeral | 貳萬伍佰陸拾壹 |
| 20561 in Egyptian Numeral | 𓂮𓍦𓎋𓏺 |
| 20561 in Babylonian Numeral |    |
Roots and stuff for 20561
| Is 20561 a square number? | 20561 is NOT a square number |
| Is 20561 a cube number? | 20561 is NOT a cube number |
| Square root of the number 20561 | 143.39107364128 |
| Cube root of the number 20561 | 27.395637503198 |
Recreational math for 20561
| Number 20561 reversed | 16502 |
| Sum of the digits | 14 |
| No of digits | 5 |