Names of 21988
| Nominal | 21988 |
| Cardinal | twenty-one thousand nine hundred eighty-eight |
| Ordinal | 21,988th |
| This number as US currency | twenty-one thousand nine hundred eighty-eight dollars |
| Is 21988 an odd number? | 21988 is NOT an odd number |
| Is 21988 an even number? | 21988 is an even number |
| Is 21988 a palindrome? | 21988 is NOT a palindrome number |
| Is 21988 a triangle number? | 21988 is NOT a triangle number |
21988 in other Bases
| Base 2 (Binary) | 1010101111001002 |
| Base 3 (Ternary) | 10100111013 |
| Base 4 (Quaternary) | 111132104 |
| Base 5 (Quinary) | 12004235 |
| Base 6 (Senary) | 2454446 |
| Base 8 (Octal) | 527448 |
| Base 12 (Duodecimal) | 1088412 |
| Base 16 (Hexadecimal) | 55E416 |
| Base 20 (Vigesimal) | 2EJ820 |
Primes and Factors tests for 21988
| Is 21988 a Prime Number? | 21988 is NOT a prime |
| Is 21988 a perfect number? | 21988 is NOT a perfect number |
| Is 21988 a Mersenne Prime? | 21988 is NOT a Mersenne prime |
| Is 21988 a Fermat Prime? | 21988 is NOT a Fermat prime |
| Is 21988 a Fibonacci Prime? | 21988 is NOT a Fibonacci prime |
| Is 21988 a Partition Prime? | 21988 is NOT a Partition prime |
| Is 21988 a Pell Prime? | 21988 is NOT a Pell prime |
| Prime Factors | Prime factors of 21988 |
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21988 in other Numerals
| 21988 in Roman Numeral | XXMCMLXXXVIII |
| 21988 in Chinese Numeral | 貳萬壹仟玖佰捌拾捌 |
| 21988 in Egyptian Numeral | 𓂮𓆼𓍪𓎍𓐁 |
| 21988 in Babylonian Numeral |   |
Roots and stuff for 21988
| Is 21988 a square number? | 21988 is NOT a square number |
| Is 21988 a cube number? | 21988 is NOT a cube number |
| Square root of the number 21988 | 148.28351223248 |
| Cube root of the number 21988 | 28.015297763014 |
Recreational math for 21988
| Number 21988 reversed | 88912 |
| Sum of the digits | 28 |
| No of digits | 5 |