Names of 18221
| Nominal | 18221 |
| Cardinal | eighteen thousand two hundred twenty-one |
| Ordinal | 18,221st |
| This number as US currency | eighteen thousand two hundred twenty-one dollars |
| Is 18221 an odd number? | 18221 is an odd number |
| Is 18221 an even number? | 18221 is NOT an even number |
| Is 18221 a palindrome? | 18221 is NOT a palindrome number |
| Is 18221 a triangle number? | 18221 is NOT a triangle number |
18221 in other Bases
| Base 2 (Binary) | 1000111001011012 |
| Base 3 (Ternary) | 2202222123 |
| Base 4 (Quaternary) | 101302314 |
| Base 5 (Quinary) | 10403415 |
| Base 6 (Senary) | 2202056 |
| Base 8 (Octal) | 434558 |
| Base 12 (Duodecimal) | A66512 |
| Base 16 (Hexadecimal) | 472D16 |
| Base 20 (Vigesimal) | 25B120 |
Primes and Factors tests for 18221
| Is 18221 a Prime Number? | 18221 is NOT a prime |
| Is 18221 a perfect number? | 18221 is NOT a perfect number |
| Is 18221 a Mersenne Prime? | 18221 is NOT a Mersenne prime |
| Is 18221 a Fermat Prime? | 18221 is NOT a Fermat prime |
| Is 18221 a Fibonacci Prime? | 18221 is NOT a Fibonacci prime |
| Is 18221 a Partition Prime? | 18221 is NOT a Partition prime |
| Is 18221 a Pell Prime? | 18221 is NOT a Pell prime |
| Prime Factors | Prime factors of 18221 |
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18221 in other Numerals
| 18221 in Roman Numeral | XVMMMCCXXI |
| 18221 in Chinese Numeral | 壹萬捌仟貳佰貳拾壹 |
| 18221 in Egyptian Numeral | 𓂭𓇃𓍣𓎇𓏺 |
| 18221 in Babylonian Numeral |    |
Roots and stuff for 18221
| Is 18221 a square number? | 18221 is NOT a square number |
| Is 18221 a cube number? | 18221 is NOT a cube number |
| Square root of the number 18221 | 134.98518437221 |
| Cube root of the number 18221 | 26.314234223877 |
Recreational math for 18221
| Number 18221 reversed | 12281 |
| Sum of the digits | 14 |
| No of digits | 5 |