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
Prime number position -
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 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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