18008944 has 10 divisors (see below), whose sum is σ = 34892360. Its totient is φ = 9004464.

The previous prime is 18008917. The next prime is 18008989. The reversal of 18008944 is 44980081.

It is a congruent number.

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, 562764 + ... + 562795.

It is an arithmetic number, because the mean of its divisors is an integer number (3489236).

Almost surely, 2^18008944 is an apocalyptic number.

It is an amenable number.

18008944 is a deficient number, since it is larger than the sum of its proper divisors (16883416).

18008944 is a wasteful number, since it uses less digits than its factorization.

18008944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125567 (or 1125561 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18008944 is about 4243.6946167226. The cubic root of 18008944 is about 262.1175394760.

The spelling of 18008944 in words is "eighteen million, eight thousand, nine hundred forty-four".