18782668 has 12 divisors (see below), whose sum is σ = 33189520. Its totient is φ = 9299952.

The previous prime is 18782641. The next prime is 18782669. The reversal of 18782668 is 86628781.

It is not an unprimeable number, because it can be changed into a prime (18782669) 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, 22383 + ... + 23206.

Almost surely, 2^18782668 is an apocalyptic number.

It is an amenable number.

18782668 is a deficient number, since it is larger than the sum of its proper divisors (14406852).

18782668 is a wasteful number, since it uses less digits than its factorization.

18782668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45696 (or 45694 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 18782668 is about 4333.8975530116. The cubic root of 18782668 is about 265.8188413554.

The spelling of 18782668 in words is "eighteen million, seven hundred eighty-two thousand, six hundred sixty-eight".