Names of 21980
| Nominal | 21980 |
| Cardinal | twenty-one thousand nine hundred eighty |
| Ordinal | 21,980th |
| This number as US currency | twenty-one thousand nine hundred eighty dollars |
| Is 21980 an odd number? | 21980 is NOT an odd number |
| Is 21980 an even number? | 21980 is an even number |
| Is 21980 a palindrome? | 21980 is NOT a palindrome number |
| Is 21980 a triangle number? | 21980 is NOT a triangle number |
21980 in other Bases
| Base 2 (Binary) | 1010101110111002 |
| Base 3 (Ternary) | 10100110023 |
| Base 4 (Quaternary) | 111131304 |
| Base 5 (Quinary) | 12004105 |
| Base 6 (Senary) | 2454326 |
| Base 8 (Octal) | 527348 |
| Base 12 (Duodecimal) | 1087812 |
| Base 16 (Hexadecimal) | 55DC16 |
| Base 20 (Vigesimal) | 2EJ020 |
Primes and Factors tests for 21980
| Is 21980 a Prime Number? | 21980 is NOT a prime |
| Is 21980 a perfect number? | 21980 is NOT a perfect number |
| Is 21980 a Mersenne Prime? | 21980 is NOT a Mersenne prime |
| Is 21980 a Fermat Prime? | 21980 is NOT a Fermat prime |
| Is 21980 a Fibonacci Prime? | 21980 is NOT a Fibonacci prime |
| Is 21980 a Partition Prime? | 21980 is NOT a Partition prime |
| Is 21980 a Pell Prime? | 21980 is NOT a Pell prime |
| Prime Factors | Prime factors of 21980 |
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21980 in other Numerals
| 21980 in Roman Numeral | XXMCMLXXX |
| 21980 in Chinese Numeral | 貳萬壹仟玖佰捌拾 |
| 21980 in Egyptian Numeral | 𓂮𓆼𓍪𓎍 |
| 21980 in Babylonian Numeral |   |
Roots and stuff for 21980
| Is 21980 a square number? | 21980 is NOT a square number |
| Is 21980 a cube number? | 21980 is NOT a cube number |
| Square root of the number 21980 | 148.25653442597 |
| Cube root of the number 21980 | 28.01189970394 |
Recreational math for 21980
| Number 21980 reversed | 08912 |
| Sum of the digits | 20 |
| No of digits | 5 |