18018572 has 72 divisors (see below), whose sum is σ = 39713520. Its totient is φ = 7050240.

The previous prime is 18018551. The next prime is 18018587. The reversal of 18018572 is 27581081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165254 + ... + 165362.

Almost surely, 2^18018572 is an apocalyptic number.

It is an amenable number.

18018572 is an abundant number, since it is smaller than the sum of its proper divisors (21694948).

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

18018572 is a wasteful number, since it uses less digits than its factorization.

18018572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 18018572 is about 4244.8288540293. The cubic root of 18018572 is about 262.1642425303.

The spelling of 18018572 in words is "eighteen million, eighteen thousand, five hundred seventy-two".