18131164 has 6 divisors (see below), whose sum is σ = 31729544. Its totient is φ = 9065580.

The previous prime is 18131161. The next prime is 18131173. The reversal of 18131164 is 46113181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18131161) by changing a digit.

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 as a sum of consecutive naturals, namely, 2266392 + ... + 2266399.

Almost surely, 2^18131164 is an apocalyptic number.

It is an amenable number.

18131164 is a deficient number, since it is larger than the sum of its proper divisors (13598380).

18131164 is a wasteful number, since it uses less digits than its factorization.

18131164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532795 (or 4532793 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 18131164 is about 4258.0704550301. The cubic root of 18131164 is about 262.7091678273.

The spelling of 18131164 in words is "eighteen million, one hundred thirty-one thousand, one hundred sixty-four".