18501252 has 48 divisors (see below), whose sum is σ = 53824512. Its totient is φ = 4805280.

The previous prime is 18501227. The next prime is 18501271. The reversal of 18501252 is 25210581.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9088 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (1121344).

Almost surely, 2^18501252 is an apocalyptic number.

18501252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18501252 is an abundant number, since it is smaller than the sum of its proper divisors (35323260).

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

18501252 is a wasteful number, since it uses less digits than its factorization.

18501252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20048 (or 20046 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 18501252 is about 4301.3081731027. The cubic root of 18501252 is about 264.4845897566.

The spelling of 18501252 in words is "eighteen million, five hundred one thousand, two hundred fifty-two".