18645868 has 12 divisors (see below), whose sum is σ = 32675440. Its totient is φ = 9310032.

The previous prime is 18645863. The next prime is 18645871. The reversal of 18645868 is 86854681.

It is not an unprimeable number, because it can be changed into a prime (18645863) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 505 + ... + 6127.

Almost surely, 2^18645868 is an apocalyptic number.

It is an amenable number.

18645868 is a deficient number, since it is larger than the sum of its proper divisors (14029572).

18645868 is a wasteful number, since it uses less digits than its factorization.

18645868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456 (or 6454 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 18645868 is about 4318.0861501364. The cubic root of 18645868 is about 265.1719211923.

The spelling of 18645868 in words is "eighteen million, six hundred forty-five thousand, eight hundred sixty-eight".