18312044 has 12 divisors (see below), whose sum is σ = 32076744. Its totient is φ = 9147264.

The previous prime is 18312037. The next prime is 18312053. The reversal of 18312044 is 44021381.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564 + ... + 8220.

It is an arithmetic number, because the mean of its divisors is an integer number (2673062).

Almost surely, 2^18312044 is an apocalyptic number.

It is an amenable number.

18312044 is a deficient number, since it is larger than the sum of its proper divisors (13764700).

18312044 is a wasteful number, since it uses less digits than its factorization.

18312044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384 (or 4382 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 18312044 is about 4279.2574122153. The cubic root of 18312044 is about 263.5798912083.

The spelling of 18312044 in words is "eighteen million, three hundred twelve thousand, forty-four".