Names of 21138
| Nominal | 21138 |
| Cardinal | twenty-one thousand one hundred thirty-eight |
| Ordinal | 21,138th |
| This number as US currency | twenty-one thousand one hundred thirty-eight dollars |
| Is 21138 an odd number? | 21138 is NOT an odd number |
| Is 21138 an even number? | 21138 is an even number |
| Is 21138 a palindrome? | 21138 is NOT a palindrome number |
| Is 21138 a triangle number? | 21138 is NOT a triangle number |
21138 in other Bases
| Base 2 (Binary) | 1010010100100102 |
| Base 3 (Ternary) | 10012222203 |
| Base 4 (Quaternary) | 110221024 |
| Base 5 (Quinary) | 11340235 |
| Base 6 (Senary) | 2415106 |
| Base 8 (Octal) | 512228 |
| Base 12 (Duodecimal) | 1029612 |
| Base 16 (Hexadecimal) | 529216 |
| Base 20 (Vigesimal) | 2CGI20 |
Primes and Factors tests for 21138
| Is 21138 a Prime Number? | 21138 is NOT a prime |
| Is 21138 a perfect number? | 21138 is NOT a perfect number |
| Is 21138 a Mersenne Prime? | 21138 is NOT a Mersenne prime |
| Is 21138 a Fermat Prime? | 21138 is NOT a Fermat prime |
| Is 21138 a Fibonacci Prime? | 21138 is NOT a Fibonacci prime |
| Is 21138 a Partition Prime? | 21138 is NOT a Partition prime |
| Is 21138 a Pell Prime? | 21138 is NOT a Pell prime |
| Prime Factors | Prime factors of 21138 |
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21138 in other Numerals
| 21138 in Roman Numeral | XXMCXXXVIII |
| 21138 in Chinese Numeral | 貳萬壹仟壹佰叄拾捌 |
| 21138 in Egyptian Numeral | 𓂮𓆼𓍢𓎈𓐁 |
| 21138 in Babylonian Numeral |    |
Roots and stuff for 21138
| Is 21138 a square number? | 21138 is NOT a square number |
| Is 21138 a cube number? | 21138 is NOT a cube number |
| Square root of the number 21138 | 145.38913301894 |
| Cube root of the number 21138 | 27.649543443875 |
Recreational math for 21138
| Number 21138 reversed | 83112 |
| Sum of the digits | 15 |
| No of digits | 5 |