18115164 has 36 divisors (see below), whose sum is σ = 47489624. Its totient is φ = 6038064.

The previous prime is 18115157. The next prime is 18115171. The reversal of 18115164 is 46151181.

It is an interprime number because it is at equal distance from previous prime (18115157) and next prime (18115171).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8347 + ... + 10290.

Almost surely, 2^18115164 is an apocalyptic number.

It is an amenable number.

18115164 is an abundant number, since it is smaller than the sum of its proper divisors (29374460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18115164 is a wasteful number, since it uses less digits than its factorization.

18115164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18656 (or 18642 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 18115164 is about 4256.1912551012. The cubic root of 18115164 is about 262.6318684379.

The spelling of 18115164 in words is "eighteen million, one hundred fifteen thousand, one hundred sixty-four".