Number 18

It has 6 divisors and a digital root of 9. Explore its full properties below, or find words and phrases with a gematria value of 18.

18

Divisors: 6

1, 2, 3, 6, 9, 18

Sum: 39

Mathematical Properties

Golden Number4,181

Reduced Digit Sum9

Magic Constant2,925

Digital Root9

Octal1(22)

Duodecimal20(16)

Hexadecimal24(12)

Binary10010

18th Values

Prime61

Triangular171

Square324

Star1,837

Pentagonal477

Cube5,832

Tetrahedral1,140

Square Pyramidal2,109

Fibonacci2,584

Harshad36

Happy Number133