18375172 has 12 divisors (see below), whose sum is σ = 32186700. Its totient is φ = 9178976.

The previous prime is 18375169. The next prime is 18375173. The reversal of 18375172 is 27157381.

It can be written as a sum of positive squares in 2 ways, for example, as 9036036 + 9339136 = 3006^2 + 3056^2 .

It is not an unprimeable number, because it can be changed into a prime (18375173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6618 + ... + 8974.

It is an arithmetic number, because the mean of its divisors is an integer number (2682225).

Almost surely, 2^18375172 is an apocalyptic number.

It is an amenable number.

18375172 is a deficient number, since it is larger than the sum of its proper divisors (13811528).

18375172 is a wasteful number, since it uses less digits than its factorization.

18375172 is an odious number, because the sum of its binary digits is odd.

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

The product of its digits is 11760, while the sum is 34.

The square root of 18375172 is about 4286.6271123110. The cubic root of 18375172 is about 263.8824277511.

The spelling of 18375172 in words is "eighteen million, three hundred seventy-five thousand, one hundred seventy-two".