18179944 has 8 divisors (see below), whose sum is σ = 34087410. Its totient is φ = 9089968.

The previous prime is 18179939. The next prime is 18179951. The reversal of 18179944 is 44997181.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 8631844 = 3090^2 + 2938^2 .

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 18179944.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136239 + ... + 1136254.

Almost surely, 2^18179944 is an apocalyptic number.

It is an amenable number.

18179944 is a deficient number, since it is larger than the sum of its proper divisors (15907466).

18179944 is a wasteful number, since it uses less digits than its factorization.

18179944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272499 (or 2272495 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 18179944 is about 4263.7945541501. The cubic root of 18179944 is about 262.9445540371.

The spelling of 18179944 in words is "eighteen million, one hundred seventy-nine thousand, nine hundred forty-four".