18125172 has 36 divisors (see below), whose sum is σ = 49342020. Its totient is φ = 5576832.

The previous prime is 18125167. The next prime is 18125197. The reversal of 18125172 is 27152181.

It can be written as a sum of positive squares in 2 ways, for example, as 1527696 + 16597476 = 1236^2 + 4074^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18897 + ... + 19832.

Almost surely, 2^18125172 is an apocalyptic number.

18125172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18125172 is an abundant number, since it is smaller than the sum of its proper divisors (31216848).

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

18125172 is a wasteful number, since it uses less digits than its factorization.

18125172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38752 (or 38747 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 18125172 is about 4257.3667918092. The cubic root of 18125172 is about 262.6802245343.

The spelling of 18125172 in words is "eighteen million, one hundred twenty-five thousand, one hundred seventy-two".