18121164 has 24 divisors (see below), whose sum is σ = 42417648. Its totient is φ = 6021120.

The previous prime is 18121163. The next prime is 18121211. The reversal of 18121164 is 46112181.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (18121163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804 + ... + 6284.

It is an arithmetic number, because the mean of its divisors is an integer number (1767402).

Almost surely, 2^18121164 is an apocalyptic number.

It is an amenable number.

18121164 is an abundant number, since it is smaller than the sum of its proper divisors (24296484).

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

18121164 is a wasteful number, since it uses less digits than its factorization.

18121164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825 (or 4823 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 18121164 is about 4256.8960522897. The cubic root of 18121164 is about 262.6608610408.

The spelling of 18121164 in words is "eighteen million, one hundred twenty-one thousand, one hundred sixty-four".