17989964 has 6 divisors (see below), whose sum is σ = 31482444. Its totient is φ = 8994980.

The previous prime is 17989943. The next prime is 17989981. The reversal of 17989964 is 46998971.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2248742 + ... + 2248749.

It is an arithmetic number, because the mean of its divisors is an integer number (5247074).

Almost surely, 2^17989964 is an apocalyptic number.

It is an amenable number.

17989964 is a deficient number, since it is larger than the sum of its proper divisors (13492480).

17989964 is a wasteful number, since it uses less digits than its factorization.

17989964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497495 (or 4497493 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 17989964 is about 4241.4577682679. The cubic root of 17989964 is about 262.0254234017.

The spelling of 17989964 in words is "seventeen million, nine hundred eighty-nine thousand, nine hundred sixty-four".