Names of 18021
| Nominal | 18021 |
| Cardinal | eighteen thousand twenty-one |
| Ordinal | 18,021st |
| This number as US currency | eighteen thousand twenty-one dollars |
| Is 18021 an odd number? | 18021 is an odd number |
| Is 18021 an even number? | 18021 is NOT an even number |
| Is 18021 a palindrome? | 18021 is NOT a palindrome number |
| Is 18021 a triangle number? | 18021 is NOT a triangle number |
18021 in other Bases
| Base 2 (Binary) | 1000110011001012 |
| Base 3 (Ternary) | 2202011103 |
| Base 4 (Quaternary) | 101212114 |
| Base 5 (Quinary) | 10340415 |
| Base 6 (Senary) | 2152336 |
| Base 8 (Octal) | 431458 |
| Base 12 (Duodecimal) | A51912 |
| Base 16 (Hexadecimal) | 466516 |
| Base 20 (Vigesimal) | 251120 |
Primes and Factors tests for 18021
| Is 18021 a Prime Number? | 18021 is NOT a prime |
| Is 18021 a perfect number? | 18021 is NOT a perfect number |
| Is 18021 a Mersenne Prime? | 18021 is NOT a Mersenne prime |
| Is 18021 a Fermat Prime? | 18021 is NOT a Fermat prime |
| Is 18021 a Fibonacci Prime? | 18021 is NOT a Fibonacci prime |
| Is 18021 a Partition Prime? | 18021 is NOT a Partition prime |
| Is 18021 a Pell Prime? | 18021 is NOT a Pell prime |
| Prime Factors | Prime factors of 18021 |
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18021 in other Numerals
| 18021 in Roman Numeral | XVMMMXXI |
| 18021 in Chinese Numeral | 壹萬捌仟貳拾壹 |
| 18021 in Egyptian Numeral | 𓂭𓇃𓎇𓏺 |
| 18021 in Babylonian Numeral |   |
Roots and stuff for 18021
| Is 18021 a square number? | 18021 is NOT a square number |
| Is 18021 a cube number? | 18021 is NOT a cube number |
| Square root of the number 18021 | 134.24231821598 |
| Cube root of the number 18021 | 26.217601753278 |
Recreational math for 18021
| Number 18021 reversed | 12081 |
| Sum of the digits | 12 |
| No of digits | 5 |