18786668 has 12 divisors (see below), whose sum is σ = 34607160. Its totient is φ = 8898912.

The previous prime is 18786661. The next prime is 18786679. The reversal of 18786668 is 86668781.

It is not an unprimeable number, because it can be changed into a prime (18786661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123521 + ... + 123672.

It is an arithmetic number, because the mean of its divisors is an integer number (2883930).

Almost surely, 2^18786668 is an apocalyptic number.

It is an amenable number.

18786668 is a deficient number, since it is larger than the sum of its proper divisors (15820492).

18786668 is a wasteful number, since it uses less digits than its factorization.

18786668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247216 (or 247214 counting only the distinct ones).

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

The square root of 18786668 is about 4334.3590068198. The cubic root of 18786668 is about 265.8377098124.

The spelling of 18786668 in words is "eighteen million, seven hundred eighty-six thousand, six hundred sixty-eight".