18529972 has 12 divisors (see below), whose sum is σ = 32457600. Its totient is φ = 9256376.

The previous prime is 18529969. The next prime is 18529981. The reversal of 18529972 is 27992581.

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, 7293 + ... + 9499.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^18529972 is an apocalyptic number.

It is an amenable number.

18529972 is a deficient number, since it is larger than the sum of its proper divisors (13927628).

18529972 is a wasteful number, since it uses less digits than its factorization.

18529972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310 (or 4308 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 18529972 is about 4304.6453977070. The cubic root of 18529972 is about 264.6213745593.

The spelling of 18529972 in words is "eighteen million, five hundred twenty-nine thousand, nine hundred seventy-two".