18865968 has 40 divisors (see below), whose sum is σ = 53169216. Its totient is φ = 5716800.

The previous prime is 18865963. The next prime is 18865969. The reversal of 18865968 is 86956881.

It is a self number, because there is not a number n which added to its sum of digits gives 18865968.

It is not an unprimeable number, because it can be changed into a prime (18865961) 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, 17338 + ... + 18393.

Almost surely, 2^18865968 is an apocalyptic number.

It is an amenable number.

18865968 is an abundant number, since it is smaller than the sum of its proper divisors (34303248).

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

18865968 is a wasteful number, since it uses less digits than its factorization.

18865968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35753 (or 35747 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 18865968 is about 4343.4972084715. The cubic root of 18865968 is about 266.2112253702.

The spelling of 18865968 in words is "eighteen million, eight hundred sixty-five thousand, nine hundred sixty-eight".