20009
Everything about the number 20009 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Names of 20009
| Nominal | 20009 |
| Cardinal | twenty thousand nine |
| Ordinal | 20,009th |
| This number as US currency | twenty thousand nine dollars |
Properties (and some facts) of 20009
| Is 20009 an odd number? | 20009 is an odd number |
| Is 20009 an even number? | 20009 is not an even number |
| Is 20009 a palindrome? | 20009 is not a palindrome |
| Is 20009 a triangle number? | 20009 is not a triangle number |
20009 in other bases
| Base 2 (Binary) | 100111000101001 |
| Base 3 (Ternary) | 1000110002 |
| Base 4 (Quaternary) | 10320221 |
| Base 5 (Quinary) | 1120014 |
| Base 6 (Senary) | 232345 |
| Base 8 (Octal) | 47051 |
| Base 12 (Duodecimal) | B6B5 |
| Base 16 (Hexadecimal) | 4E29 |
| Base 20 (Vigesimal) | 2A09 |
Primes and factors tests for 20009
| Is 20009 a prime number? | 20009 is not a prime number |
| Is 20009 a perfect number? | 20009 is not a perfect number |
| Is 20009 a Mersenne prime? | 20009 is not a Mersenne prime |
| Is 20009 a Fermat prime? | 20009 is not a Fermat prime |
| Is 20009 a Fibonacci prime? | 20009 is not a Fibonacci prime |
| Is 20009 a partition prime? | 20009 is not a partition prime |
| Is 20009 a Pell prime? | 20009 is not a Pell prime |
| Prime Factors | Prime factors of 20009 |
20009 in other numeral systems
| 20009 in Roman numerals | XXIX |
| 20009 in Chinese numerals | 貳萬玖 |
| 20009 in Babylonian numerals |    |
| 20009 in Egyptian numerals | 𓂮𓐂 |
Roots and squares for 20009
| Is 20009 a square number? | 20009 is not a square number |
| Is 20009 a cube number? | 20009 is not a cube number |
| Square root of 20009 | 141.45317246354 |
| Cube root of 20009 | 27.148247181783 |
Recreational math for 20009
| Number 20009 reversed | 90002 |
| Sum of the digits | 11 |
| Number of digits | 5 |