Names of 21993
| Nominal | 21993 |
| Cardinal | twenty-one thousand nine hundred ninety-three |
| Ordinal | 21,993rd |
| This number as US currency | twenty-one thousand nine hundred ninety-three dollars |
| Is 21993 an odd number? | 21993 is an odd number |
| Is 21993 an even number? | 21993 is NOT an even number |
| Is 21993 a palindrome? | 21993 is NOT a palindrome number |
| Is 21993 a triangle number? | 21993 is NOT a triangle number |
21993 in other Bases
| Base 2 (Binary) | 1010101111010012 |
| Base 3 (Ternary) | 10100111203 |
| Base 4 (Quaternary) | 111132214 |
| Base 5 (Quinary) | 12004335 |
| Base 6 (Senary) | 2454536 |
| Base 8 (Octal) | 527518 |
| Base 12 (Duodecimal) | 1088912 |
| Base 16 (Hexadecimal) | 55E916 |
| Base 20 (Vigesimal) | 2EJD20 |
Primes and Factors tests for 21993
| Is 21993 a Prime Number? | 21993 is NOT a prime |
| Is 21993 a perfect number? | 21993 is NOT a perfect number |
| Is 21993 a Mersenne Prime? | 21993 is NOT a Mersenne prime |
| Is 21993 a Fermat Prime? | 21993 is NOT a Fermat prime |
| Is 21993 a Fibonacci Prime? | 21993 is NOT a Fibonacci prime |
| Is 21993 a Partition Prime? | 21993 is NOT a Partition prime |
| Is 21993 a Pell Prime? | 21993 is NOT a Pell prime |
| Prime Factors | Prime factors of 21993 |
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21993 in other Numerals
| 21993 in Roman Numeral | XXMCMXCIII |
| 21993 in Chinese Numeral | 貳萬壹仟玖佰玖拾叄 |
| 21993 in Egyptian Numeral | 𓂮𓆼𓍪𓎎𓏼 |
| 21993 in Babylonian Numeral |   |
Roots and stuff for 21993
| Is 21993 a square number? | 21993 is NOT a square number |
| Is 21993 a cube number? | 21993 is NOT a cube number |
| Square root of the number 21993 | 148.30037086939 |
| Cube root of the number 21993 | 28.017421131405 |
Recreational math for 21993
| Number 21993 reversed | 39912 |
| Sum of the digits | 24 |
| No of digits | 5 |