Names of 20001
| Nominal | 20001 |
| Cardinal | twenty thousand one |
| Ordinal | 20,001st |
| This number as US currency | twenty thousand one dollars |
| Is 20001 an odd number? | 20001 is an odd number |
| Is 20001 an even number? | 20001 is NOT an even number |
| Is 20001 a palindrome? | 20001 is NOT a palindrome number |
| Is 20001 a triangle number? | 20001 is NOT a triangle number |
20001 in other Bases
| Base 2 (Binary) | 1001110001000012 |
| Base 3 (Ternary) | 10001022103 |
| Base 4 (Quaternary) | 103202014 |
| Base 5 (Quinary) | 11200015 |
| Base 6 (Senary) | 2323336 |
| Base 8 (Octal) | 470418 |
| Base 12 (Duodecimal) | B6A912 |
| Base 16 (Hexadecimal) | 4E2116 |
| Base 20 (Vigesimal) | 2A0120 |
Primes and Factors tests for 20001
| Is 20001 a Prime Number? | 20001 is NOT a prime |
| Is 20001 a perfect number? | 20001 is NOT a perfect number |
| Is 20001 a Mersenne Prime? | 20001 is NOT a Mersenne prime |
| Is 20001 a Fermat Prime? | 20001 is NOT a Fermat prime |
| Is 20001 a Fibonacci Prime? | 20001 is NOT a Fibonacci prime |
| Is 20001 a Partition Prime? | 20001 is NOT a Partition prime |
| Is 20001 a Pell Prime? | 20001 is NOT a Pell prime |
| Prime Factors | Prime factors of 20001 |
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20001 in other Numerals
| 20001 in Roman Numeral | XXI |
| 20001 in Chinese Numeral | 貳萬壹 |
| 20001 in Egyptian Numeral | 𓂮𓏺 |
| 20001 in Babylonian Numeral |    |
Roots and stuff for 20001
| Is 20001 a square number? | 20001 is NOT a square number |
| Is 20001 a cube number? | 20001 is NOT a cube number |
| Square root of the number 20001 | 141.42489172702 |
| Cube root of the number 20001 | 27.144628561345 |
Recreational math for 20001
| Number 20001 reversed | 10002 |
| Sum of the digits | 3 |
| No of digits | 5 |