18944164 has 6 divisors (see below), whose sum is σ = 33152294. Its totient is φ = 9472080.

The previous prime is 18944147. The next prime is 18944201. The reversal of 18944164 is 46144981.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 1304164 = 4200^2 + 1142^2 .

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 as a sum of consecutive naturals, namely, 2368017 + ... + 2368024.

Almost surely, 2^18944164 is an apocalyptic number.

It is an amenable number.

18944164 is a deficient number, since it is larger than the sum of its proper divisors (14208130).

18944164 is a wasteful number, since it uses less digits than its factorization.

18944164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736045 (or 4736043 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 18944164 is about 4352.4894026293. The cubic root of 18944164 is about 266.5785173924.

The spelling of 18944164 in words is "eighteen million, nine hundred forty-four thousand, one hundred sixty-four".