18972152 has 16 divisors (see below), whose sum is σ = 35619000. Its totient is φ = 9473760.

The previous prime is 18972137. The next prime is 18972169. The reversal of 18972152 is 25127981.

It is a super-2 number, since 2×18972152² = 719885103022208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474 + ... + 13022.

Almost surely, 2^18972152 is an apocalyptic number.

It is an amenable number.

18972152 is a deficient number, since it is larger than the sum of its proper divisors (16646848).

18972152 is a wasteful number, since it uses less digits than its factorization.

18972152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086 (or 3082 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 18972152 is about 4355.7033875139. The cubic root of 18972152 is about 266.7097333221.

The spelling of 18972152 in words is "eighteen million, nine hundred seventy-two thousand, one hundred fifty-two".