18272164 has 12 divisors (see below), whose sum is σ = 32062464. Its totient is φ = 9111464.

The previous prime is 18272159. The next prime is 18272179. The reversal of 18272164 is 46127281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4432 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (2671872).

Almost surely, 2^18272164 is an apocalyptic number.

It is an amenable number.

18272164 is a deficient number, since it is larger than the sum of its proper divisors (13790300).

18272164 is a wasteful number, since it uses less digits than its factorization.

18272164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12314 (or 12312 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 18272164 is about 4274.5951855117. The cubic root of 18272164 is about 263.3884105629.

The spelling of 18272164 in words is "eighteen million, two hundred seventy-two thousand, one hundred sixty-four".