18397132 has 24 divisors (see below), whose sum is σ = 34790000. Its totient is φ = 8462016.

The previous prime is 18397123. The next prime is 18397133. The reversal of 18397132 is 23179381.

It is not an unprimeable number, because it can be changed into a prime (18397133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25594 + ... + 26302.

Almost surely, 2^18397132 is an apocalyptic number.

It is an amenable number.

18397132 is a deficient number, since it is larger than the sum of its proper divisors (16392868).

18397132 is a wasteful number, since it uses less digits than its factorization.

18397132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1223 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 18397132 is about 4289.1878019038. The cubic root of 18397132 is about 263.9875070611.

The spelling of 18397132 in words is "eighteen million, three hundred ninety-seven thousand, one hundred thirty-two".