18312244 has 12 divisors (see below), whose sum is σ = 32145568. Its totient is φ = 9127800.

The previous prime is 18312233. The next prime is 18312263. The reversal of 18312244 is 44221381.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 5592 + ... + 8239.

Almost surely, 2^18312244 is an apocalyptic number.

It is an amenable number.

18312244 is a deficient number, since it is larger than the sum of its proper divisors (13833324).

18312244 is a wasteful number, since it uses less digits than its factorization.

18312244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14166 (or 14164 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 18312244 is about 4279.2807806920. The cubic root of 18312244 is about 263.5808507914.

The spelling of 18312244 in words is "eighteen million, three hundred twelve thousand, two hundred forty-four".