18364404 has 24 divisors (see below), whose sum is σ = 43763328. Its totient is φ = 5991040.

The previous prime is 18364387. The next prime is 18364417. The reversal of 18364404 is 40446381.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15717 + ... + 16844.

It is an arithmetic number, because the mean of its divisors is an integer number (1823472).

Almost surely, 2^18364404 is an apocalyptic number.

It is an amenable number.

18364404 is an abundant number, since it is smaller than the sum of its proper divisors (25398924).

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

18364404 is a wasteful number, since it uses less digits than its factorization.

18364404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32615 (or 32613 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 18364404 is about 4285.3709291029. The cubic root of 18364404 is about 263.8308719306.

The spelling of 18364404 in words is "eighteen million, three hundred sixty-four thousand, four hundred four".