18907244 has 12 divisors (see below), whose sum is σ = 33142368. Its totient is φ = 9438000.

The previous prime is 18907237. The next prime is 18907253. The reversal of 18907244 is 44270981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932 + ... + 6219.

It is an arithmetic number, because the mean of its divisors is an integer number (2761864).

Almost surely, 2^18907244 is an apocalyptic number.

It is an amenable number.

18907244 is a deficient number, since it is larger than the sum of its proper divisors (14235124).

18907244 is a wasteful number, since it uses less digits than its factorization.

18907244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816 (or 7814 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18907244 is about 4348.2460831926. The cubic root of 18907244 is about 266.4052277980.

The spelling of 18907244 in words is "eighteen million, nine hundred seven thousand, two hundred forty-four".