18272132 has 6 divisors (see below), whose sum is σ = 31976238. Its totient is φ = 9136064.

The previous prime is 18272099. The next prime is 18272153. The reversal of 18272132 is 23127281.

It can be written as a sum of positive squares in only one way, i.e., 15888196 + 2383936 = 3986^2 + 1544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284013 + ... + 2284020.

It is an arithmetic number, because the mean of its divisors is an integer number (5329373).

Almost surely, 2^18272132 is an apocalyptic number.

It is an amenable number.

18272132 is a deficient number, since it is larger than the sum of its proper divisors (13704106).

18272132 is a wasteful number, since it uses less digits than its factorization.

18272132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568037 (or 4568035 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 18272132 is about 4274.5914424656. The cubic root of 18272132 is about 263.3882568057.

The spelling of 18272132 in words is "eighteen million, two hundred seventy-two thousand, one hundred thirty-two".