18444904 has 8 divisors (see below), whose sum is σ = 34584210. Its totient is φ = 9222448.

The previous prime is 18444889. The next prime is 18444929. The reversal of 18444904 is 40944481.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 40804 = 4290^2 + 202^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18444904.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1152799 + ... + 1152814.

Almost surely, 2^18444904 is an apocalyptic number.

It is an amenable number.

18444904 is a deficient number, since it is larger than the sum of its proper divisors (16139306).

18444904 is a wasteful number, since it uses less digits than its factorization.

18444904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305619 (or 2305615 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18444904 is about 4294.7530778847. The cubic root of 18444904 is about 264.2158091505.

The spelling of 18444904 in words is "eighteen million, four hundred forty-four thousand, nine hundred four".