18338572 has 24 divisors (see below), whose sum is σ = 38608640. Its totient is φ = 7445520.

The previous prime is 18338561. The next prime is 18338581. The reversal of 18338572 is 27583381.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16704 + ... + 17767.

Almost surely, 2^18338572 is an apocalyptic number.

It is an amenable number.

18338572 is an abundant number, since it is smaller than the sum of its proper divisors (20270068).

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

18338572 is a wasteful number, since it uses less digits than its factorization.

18338572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34501 (or 34499 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 18338572 is about 4282.3558936641. The cubic root of 18338572 is about 263.7071093677.

The spelling of 18338572 in words is "eighteen million, three hundred thirty-eight thousand, five hundred seventy-two".