18988168 has 16 divisors (see below), whose sum is σ = 35732880. Its totient is φ = 9459408.

The previous prime is 18988121. The next prime is 18988171. The reversal of 18988168 is 86188981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (2233305).

Almost surely, 2^18988168 is an apocalyptic number.

It is an amenable number.

18988168 is a deficient number, since it is larger than the sum of its proper divisors (16744712).

18988168 is a wasteful number, since it uses less digits than its factorization.

18988168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8676 (or 8672 counting only the distinct ones).

The product of its digits is 221184, while the sum is 49.

The square root of 18988168 is about 4357.5415086950. The cubic root of 18988168 is about 266.7847629698.

The spelling of 18988168 in words is "eighteen million, nine hundred eighty-eight thousand, one hundred sixty-eight".