18368904 has 64 divisors (see below), whose sum is σ = 48522240. Its totient is φ = 5783360.

The previous prime is 18368887. The next prime is 18368923. The reversal of 18368904 is 40986381.

It is a super-2 number, since 2×18368904² = 674833268322432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58909 + ... + 59219.

It is an arithmetic number, because the mean of its divisors is an integer number (758160).

Almost surely, 2^18368904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18368904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24261120).

18368904 is an abundant number, since it is smaller than the sum of its proper divisors (30153336).

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

18368904 is a wasteful number, since it uses less digits than its factorization.

18368904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18368904 is about 4285.8959390074. The cubic root of 18368904 is about 263.8524198114.

The spelling of 18368904 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred four".