18879868 has 24 divisors (see below), whose sum is σ = 38979584. Its totient is φ = 7830000.

The previous prime is 18879859. The next prime is 18879869. The reversal of 18879868 is 86897881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18879869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10008 + ... + 11743.

Almost surely, 2^18879868 is an apocalyptic number.

It is an amenable number.

18879868 is an abundant number, since it is smaller than the sum of its proper divisors (20099716).

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

18879868 is a wasteful number, since it uses less digits than its factorization.

18879868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21793 (or 21791 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 55.

The square root of 18879868 is about 4345.0970069723. The cubic root of 18879868 is about 266.2765887029.

The spelling of 18879868 in words is "eighteen million, eight hundred seventy-nine thousand, eight hundred sixty-eight".