18275904 has 42 divisors (see below), whose sum is σ = 52386230. Its totient is φ = 6091776.

The previous prime is 18275863. The next prime is 18275909. The reversal of 18275904 is 40957281.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 230400 = 4248^2 + 480^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18275909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15289 + ... + 16440.

Almost surely, 2^18275904 is an apocalyptic number.

It is an amenable number.

18275904 is an abundant number, since it is smaller than the sum of its proper divisors (34110326).

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

18275904 is a wasteful number, since it uses less digits than its factorization.

18275904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31747 (or 31734 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18275904 is about 4275.0326314544. The cubic root of 18275904 is about 263.4063797072.

The spelling of 18275904 in words is "eighteen million, two hundred seventy-five thousand, nine hundred four".