18524272 has 80 divisors (see below), whose sum is σ = 41559840. Its totient is φ = 7934976.

The previous prime is 18524239. The next prime is 18524287. The reversal of 18524272 is 27242581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223143 + ... + 223225.

It is an arithmetic number, because the mean of its divisors is an integer number (519498).

Almost surely, 2^18524272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18524272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20779920).

18524272 is an abundant number, since it is smaller than the sum of its proper divisors (23035568).

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

18524272 is a wasteful number, since it uses less digits than its factorization.

18524272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 164 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 18524272 is about 4303.9832713430. The cubic root of 18524272 is about 264.5942384053.

The spelling of 18524272 in words is "eighteen million, five hundred twenty-four thousand, two hundred seventy-two".