20001
Everything about the number 20001 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Names of 20001
| Nominal | 20001 |
| Cardinal | twenty thousand one |
| Ordinal | 20,001st |
| This number as US currency | twenty thousand one dollars |
Properties (and some facts) of 20001
| 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 |
| Is 20001 a triangle number? | 20001 is not a triangle number |
20001 in other bases
| Base 2 (Binary) | 100111000100001 |
| Base 3 (Ternary) | 1000102210 |
| Base 4 (Quaternary) | 10320201 |
| Base 5 (Quinary) | 1120001 |
| Base 6 (Senary) | 232333 |
| Base 8 (Octal) | 47041 |
| Base 12 (Duodecimal) | B6A9 |
| Base 16 (Hexadecimal) | 4E21 |
| Base 20 (Vigesimal) | 2A01 |
Primes and factors tests for 20001
| Is 20001 a prime number? | 20001 is not a prime number |
| 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 |
20001 in other numeral systems
| 20001 in Roman numerals | XXI |
| 20001 in Chinese numerals | 貳萬壹 |
| 20001 in Babylonian numerals |    |
| 20001 in Egyptian numerals | 𓂮𓏺 |
Roots and squares 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 20001 | 141.42489172702 |
| Cube root of 20001 | 27.144628561345 |
Recreational math for 20001
| Number 20001 reversed | 10002 |
| Sum of the digits | 3 |
| Number of digits | 5 |