18885668 has 24 divisors (see below), whose sum is σ = 34839168. Its totient is φ = 8940096.

The previous prime is 18885631. The next prime is 18885673. The reversal of 18885668 is 86658881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8480 + ... + 10472.

It is an arithmetic number, because the mean of its divisors is an integer number (1451632).

Almost surely, 2^18885668 is an apocalyptic number.

It is an amenable number.

18885668 is a deficient number, since it is larger than the sum of its proper divisors (15953500).

18885668 is a wasteful number, since it uses less digits than its factorization.

18885668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2121 counting only the distinct ones).

The product of its digits is 737280, while the sum is 50.

The square root of 18885668 is about 4345.7643746526. The cubic root of 18885668 is about 266.3038531254.

The spelling of 18885668 in words is "eighteen million, eight hundred eighty-five thousand, six hundred sixty-eight".