18045572 has 12 divisors (see below), whose sum is σ = 31610880. Its totient is φ = 9013896.

The previous prime is 18045571. The next prime is 18045607. The reversal of 18045572 is 27554081.

It is not an unprimeable number, because it can be changed into a prime (18045571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4829 + ... + 7707.

It is an arithmetic number, because the mean of its divisors is an integer number (2634240).

Almost surely, 2^18045572 is an apocalyptic number.

It is an amenable number.

18045572 is a deficient number, since it is larger than the sum of its proper divisors (13565308).

18045572 is a wasteful number, since it uses less digits than its factorization.

18045572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450 (or 4448 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 18045572 is about 4248.0080037589. The cubic root of 18045572 is about 262.2951241917.

The spelling of 18045572 in words is "eighteen million, forty-five thousand, five hundred seventy-two".