Names of 20987
| Nominal | 20987 |
| Cardinal | twenty thousand nine hundred eighty-seven |
| Ordinal | 20,987th |
| This number as US currency | twenty thousand nine hundred eighty-seven dollars |
| Is 20987 an odd number? | 20987 is an odd number |
| Is 20987 an even number? | 20987 is NOT an even number |
| Is 20987 a palindrome? | 20987 is NOT a palindrome number |
| Is 20987 a triangle number? | 20987 is NOT a triangle number |
20987 in other Bases
| Base 2 (Binary) | 1010001111110112 |
| Base 3 (Ternary) | 10012100223 |
| Base 4 (Quaternary) | 110133234 |
| Base 5 (Quinary) | 11324225 |
| Base 6 (Senary) | 2410556 |
| Base 8 (Octal) | 507738 |
| Base 12 (Duodecimal) | 1018B12 |
| Base 16 (Hexadecimal) | 51FB16 |
| Base 20 (Vigesimal) | 2C9720 |
Primes and Factors tests for 20987
| Is 20987 a Prime Number? | 20987 is NOT a prime |
| Is 20987 a perfect number? | 20987 is NOT a perfect number |
| Is 20987 a Mersenne Prime? | 20987 is NOT a Mersenne prime |
| Is 20987 a Fermat Prime? | 20987 is NOT a Fermat prime |
| Is 20987 a Fibonacci Prime? | 20987 is NOT a Fibonacci prime |
| Is 20987 a Partition Prime? | 20987 is NOT a Partition prime |
| Is 20987 a Pell Prime? | 20987 is NOT a Pell prime |
| Prime Factors | Prime factors of 20987 |
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20987 in other Numerals
| 20987 in Roman Numeral | XXCMLXXXVII |
| 20987 in Chinese Numeral | 貳萬玖佰捌拾柒 |
| 20987 in Egyptian Numeral | 𓂮𓍪𓎍𓐀 |
| 20987 in Babylonian Numeral |    |
Roots and stuff for 20987
| Is 20987 a square number? | 20987 is NOT a square number |
| Is 20987 a cube number? | 20987 is NOT a cube number |
| Square root of the number 20987 | 144.86890625666 |
| Cube root of the number 20987 | 27.583547570516 |
Recreational math for 20987
| Number 20987 reversed | 78902 |
| Sum of the digits | 26 |
| No of digits | 5 |