18104972 has 6 divisors (see below), whose sum is σ = 31683708. Its totient is φ = 9052484.

The previous prime is 18104939. The next prime is 18104987. The reversal of 18104972 is 27940181.

It is a super-2 number, since 2×18104972² = 655580022241568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2263118 + ... + 2263125.

It is an arithmetic number, because the mean of its divisors is an integer number (5280618).

Almost surely, 2^18104972 is an apocalyptic number.

It is an amenable number.

18104972 is a deficient number, since it is larger than the sum of its proper divisors (13578736).

18104972 is a wasteful number, since it uses less digits than its factorization.

18104972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526247 (or 4526245 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 18104972 is about 4254.9937720283. The cubic root of 18104972 is about 262.5826049928.

The spelling of 18104972 in words is "eighteen million, one hundred four thousand, nine hundred seventy-two".