18686768 has 40 divisors (see below), whose sum is σ = 37499088. Its totient is φ = 9015552.

The previous prime is 18686753. The next prime is 18686779. The reversal of 18686768 is 86768681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107930 + ... + 108102.

Almost surely, 2^18686768 is an apocalyptic number.

It is an amenable number.

18686768 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

18686768 is a wasteful number, since it uses less digits than its factorization.

18686768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 375 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 18686768 is about 4322.8194503125. The cubic root of 18686768 is about 265.3656658382.

The spelling of 18686768 in words is "eighteen million, six hundred eighty-six thousand, seven hundred sixty-eight".