# Number 18

## Properties of the number 18

 Prime Factorization 2 x 32 Divisors 1, 2, 3, 6, 9, 18 Count of divisors 6 Sum of divisors 39 Previous integer 17 Next integer 19 Is prime? NO Previous prime 17 Next prime 19 18th prime number ↻ calculating, please wait Is a Fibonacci number? NO 18th Fibonacci number 2584 Zeckendorf representation 13 + 5 Is a Pell number? NO Is a regular number? YES Is a perfect number? NO Is a perfect square number? NO Is a perfect cube number? NO Is power of 2? NO Is power of 3? NO Factorial 18! 6402373705728000 Square 182 324 Square root √18 4.2426406871193 Cube 183 5832 Cubic root ∛18 2.6207413942089 Natural logarithm 2.8903717578962 Decimal logarithm 1.2552725051033

## Trigonometry of the number 18

 18 modulo 360° 18° Sine of 18 radians -0.75098724677168 Cosine of 18 radians 0.66031670824408 Tangent of 18 radians -1.1373137123377 Sine of 18 degrees 0.30901699437495 Cosine of 18 degrees 0.95105651629515 Tangent of 18 degrees 0.32491969623291 18 degrees in radiants 0.31415926535898 18 radiants in degrees 1031.3240312355

## Base conversion of the number 18

 Binary 10010 Octal 22 Duodecimal 16 Hexadecimal 12

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