18396159 has 16 divisors (see below), whose sum is σ = 27101952. Its totient is φ = 11040128.

The previous prime is 18396149. The next prime is 18396163. The reversal of 18396159 is 95169381.

It is a cyclic number.

It is not a de Polignac number, because 18396159 - 2⁴ = 18396143 is a prime.

It is a super-3 number, since 3×18396159³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18396159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6669 + ... + 9014.

It is an arithmetic number, because the mean of its divisors is an integer number (1693872).

Almost surely, 2^18396159 is an apocalyptic number.

18396159 is a deficient number, since it is larger than the sum of its proper divisors (8705793).

18396159 is a wasteful number, since it uses less digits than its factorization.

18396159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15726.

The product of its digits is 58320, while the sum is 42.

The square root of 18396159 is about 4289.0743756666. The cubic root of 18396159 is about 263.9828529956.

The spelling of 18396159 in words is "eighteen million, three hundred ninety-six thousand, one hundred fifty-nine".