18907572 has 12 divisors (see below), whose sum is σ = 44117696. Its totient is φ = 6302520.

The previous prime is 18907549. The next prime is 18907597. The reversal of 18907572 is 27570981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18907572.

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, 787804 + ... + 787827.

Almost surely, 2^18907572 is an apocalyptic number.

18907572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18907572 is an abundant number, since it is smaller than the sum of its proper divisors (25210124).

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

18907572 is a wasteful number, since it uses less digits than its factorization.

18907572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575638 (or 1575636 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 18907572 is about 4348.2837993857. The cubic root of 18907572 is about 266.4067683082.

The spelling of 18907572 in words is "eighteen million, nine hundred seven thousand, five hundred seventy-two".