18650668 has 6 divisors (see below), whose sum is σ = 32638676. Its totient is φ = 9325332.

The previous prime is 18650633. The next prime is 18650669. The reversal of 18650668 is 86605681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18650668.

It is not an unprimeable number, because it can be changed into a prime (18650669) 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 as a sum of consecutive naturals, namely, 2331330 + ... + 2331337.

Almost surely, 2^18650668 is an apocalyptic number.

It is an amenable number.

18650668 is a deficient number, since it is larger than the sum of its proper divisors (13988008).

18650668 is a wasteful number, since it uses less digits than its factorization.

18650668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662671 (or 4662669 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 18650668 is about 4318.6419161584. The cubic root of 18650668 is about 265.1946736151.

The spelling of 18650668 in words is "eighteen million, six hundred fifty thousand, six hundred sixty-eight".