18304472 has 8 divisors (see below), whose sum is σ = 34320900. Its totient is φ = 9152232.

The previous prime is 18304459. The next prime is 18304483. The reversal of 18304472 is 27440381.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1144022 + ... + 1144037.

Almost surely, 2^18304472 is an apocalyptic number.

It is an amenable number.

18304472 is a deficient number, since it is larger than the sum of its proper divisors (16016428).

18304472 is a wasteful number, since it uses less digits than its factorization.

18304472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288065 (or 2288061 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 18304472 is about 4278.3725877955. The cubic root of 18304472 is about 263.5435562495.

The spelling of 18304472 in words is "eighteen million, three hundred four thousand, four hundred seventy-two".