Names of 19990
| Nominal | 19990 |
| Cardinal | nineteen thousand nine hundred ninety |
| Ordinal | 19,990th |
| This number as US currency | nineteen thousand nine hundred ninety dollars |
| Is 19990 an odd number? | 19990 is NOT an odd number |
| Is 19990 an even number? | 19990 is an even number |
| Is 19990 a palindrome? | 19990 is NOT a palindrome number |
| Is 19990 a triangle number? | 19990 is NOT a triangle number |
19990 in other Bases
| Base 2 (Binary) | 1001110000101102 |
| Base 3 (Ternary) | 10001021013 |
| Base 4 (Quaternary) | 103201124 |
| Base 5 (Quinary) | 11144305 |
| Base 6 (Senary) | 2323146 |
| Base 8 (Octal) | 470268 |
| Base 12 (Duodecimal) | B69A12 |
| Base 16 (Hexadecimal) | 4E1616 |
| Base 20 (Vigesimal) | 29JA20 |
Primes and Factors tests for 19990
| Is 19990 a Prime Number? | 19990 is NOT a prime |
| Is 19990 a perfect number? | 19990 is NOT a perfect number |
| Is 19990 a Mersenne Prime? | 19990 is NOT a Mersenne prime |
| Is 19990 a Fermat Prime? | 19990 is NOT a Fermat prime |
| Is 19990 a Fibonacci Prime? | 19990 is NOT a Fibonacci prime |
| Is 19990 a Partition Prime? | 19990 is NOT a Partition prime |
| Is 19990 a Pell Prime? | 19990 is NOT a Pell prime |
| Prime Factors | Prime factors of 19990 |
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19990 in other Numerals
| 19990 in Roman Numeral | XMXCMXC |
| 19990 in Chinese Numeral | 壹萬玖仟玖佰玖拾 |
| 19990 in Egyptian Numeral | 𓂭𓇄𓍪𓎎 |
| 19990 in Babylonian Numeral |    |
Roots and stuff for 19990
| Is 19990 a square number? | 19990 is NOT a square number |
| Is 19990 a cube number? | 19990 is NOT a cube number |
| Square root of the number 19990 | 141.38599647773 |
| Cube root of the number 19990 | 27.139651382374 |
Recreational math for 19990
| Number 19990 reversed | 09991 |
| Sum of the digits | 28 |
| No of digits | 5 |