18914988 has 24 divisors (see below), whose sum is σ = 44542960. Its totient is φ = 6246720.

The previous prime is 18914963. The next prime is 18915007. The reversal of 18914988 is 88941981.

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 in 7 ways as a sum of consecutive naturals, for example, 5923 + ... + 8538.

Almost surely, 2^18914988 is an apocalyptic number.

It is an amenable number.

18914988 is an abundant number, since it is smaller than the sum of its proper divisors (25627972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18914988 is a wasteful number, since it uses less digits than its factorization.

18914988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577 (or 14575 counting only the distinct ones).

The product of its digits is 165888, while the sum is 48.

The square root of 18914988 is about 4349.1364660125. The cubic root of 18914988 is about 266.4415941150.

The spelling of 18914988 in words is "eighteen million, nine hundred fourteen thousand, nine hundred eighty-eight".