18925172 has 18 divisors (see below), whose sum is σ = 38526642. Its totient is φ = 8110704.

The previous prime is 18925111. The next prime is 18925201. The reversal of 18925172 is 27152981.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 6280036 = 3556^2 + 2506^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48083 + ... + 48474.

It is an arithmetic number, because the mean of its divisors is an integer number (2140369).

Almost surely, 2^18925172 is an apocalyptic number.

It is an amenable number.

18925172 is an abundant number, since it is smaller than the sum of its proper divisors (19601470).

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

18925172 is a wasteful number, since it uses less digits than its factorization.

18925172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96575 (or 96566 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 18925172 is about 4350.3071155954. The cubic root of 18925172 is about 266.4894037208.

The spelling of 18925172 in words is "eighteen million, nine hundred twenty-five thousand, one hundred seventy-two".