20021
Everything about the number 20021 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Names of 20021
| Nominal | 20021 |
| Cardinal | twenty thousand twenty-one |
| Ordinal | 20,021st |
| This number as US currency | twenty thousand twenty-one dollars |
Properties (and some facts) of 20021
| Is 20021 an odd number? | 20021 is an odd number |
| Is 20021 an even number? | 20021 is not an even number |
| Is 20021 a palindrome? | 20021 is not a palindrome |
| Is 20021 a triangle number? | 20021 is not a triangle number |
20021 in other bases
| Base 2 (Binary) | 100111000110101 |
| Base 3 (Ternary) | 1000110112 |
| Base 4 (Quaternary) | 10320311 |
| Base 5 (Quinary) | 1120041 |
| Base 6 (Senary) | 232405 |
| Base 8 (Octal) | 47065 |
| Base 12 (Duodecimal) | B705 |
| Base 16 (Hexadecimal) | 4E35 |
| Base 20 (Vigesimal) | 2A11 |
Primes and factors tests for 20021
| Is 20021 a prime number? | 20021 is a prime number |
| Is 20021 a perfect number? | 20021 is not a perfect number |
| Is 20021 a Mersenne prime? | 20021 is not a Mersenne prime |
| Is 20021 a Fermat prime? | 20021 is not a Fermat prime |
| Is 20021 a Fibonacci prime? | 20021 is not a Fibonacci prime |
| Is 20021 a partition prime? | 20021 is not a partition prime |
| Is 20021 a Pell prime? | 20021 is not a Pell prime |
| Prime Factors | Prime factors of 20021 |
20021 in other numeral systems
| 20021 in Roman numerals | XXXXI |
| 20021 in Chinese numerals | 貳萬貳拾壹 |
| 20021 in Babylonian numerals |    |
| 20021 in Egyptian numerals | 𓂮𓎇𓏺 |
Roots and squares for 20021
| Is 20021 a square number? | 20021 is not a square number |
| Is 20021 a cube number? | 20021 is not a cube number |
| Square root of 20021 | 141.49558296993 |
| Cube root of 20021 | 27.153673304384 |
Recreational math for 20021
| Number 20021 reversed | 12002 |
| Sum of the digits | 5 |
| Number of digits | 5 |