19
Everything about the number 19 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 19
| Nominal | 19 |
| Cardinal | nineteen |
| Ordinal | 19th |
| This number as US currency | nineteen dollars |
Properties (and some facts) of 19
| Is 19 an odd number? | 19 is an odd number |
| Is 19 an even number? | 19 is not an even number |
| Is 19 a palindrome? | 19 is not a palindrome |
| Is 19 a triangle number? | 19 is not a triangle number |
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19 in other bases
| Base 2 (Binary) | 10011 |
| Base 3 (Ternary) | 201 |
| Base 4 (Quaternary) | 103 |
| Base 5 (Quinary) | 34 |
| Base 6 (Senary) | 31 |
| Base 8 (Octal) | 23 |
| Base 12 (Duodecimal) | 17 |
| Base 16 (Hexadecimal) | 13 |
| Base 20 (Vigesimal) | J |
Primes and factors tests for 19
| Is 19 a prime number? | 19 is a prime number |
| Is 19 a perfect number? | 19 is not a perfect number |
| Is 19 a Mersenne prime? | 19 is not a Mersenne prime |
| Is 19 a Fermat prime? | 19 is not a Fermat prime |
| Is 19 a Fibonacci prime? | 19 is not a Fibonacci prime |
| Is 19 a partition prime? | 19 is not a partition prime |
| Is 19 a Pell prime? | 19 is not a Pell prime |
| Prime Factors | Prime factors of 19 |
19 in other numeral systems
| 19 in Roman numerals | XIX |
| 19 in Chinese numerals | 壹拾玖 |
| 19 in Babylonian numerals |  |
| 19 in Egyptian numerals | 𓎆𓐂 |
Roots and squares for 19
| Is 19 a square number? | 19 is not a square number |
| Is 19 a cube number? | 19 is not a cube number |
| Square root of 19 | 4.3588989435407 |
| Cube root of 19 | 2.6684016487219 |
Recreational math for 19
| Number 19 reversed | 91 |
| Sum of the digits | 10 |
| Number of digits | 2 |
Arithmetic tables for 19
Other pages about 19
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