18740668 has 6 divisors (see below), whose sum is σ = 32796176. Its totient is φ = 9370332.

The previous prime is 18740629. The next prime is 18740677. The reversal of 18740668 is 86604781.

It is a self number, because there is not a number n which added to its sum of digits gives 18740668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2342580 + ... + 2342587.

Almost surely, 2^18740668 is an apocalyptic number.

It is an amenable number.

18740668 is a deficient number, since it is larger than the sum of its proper divisors (14055508).

18740668 is a wasteful number, since it uses less digits than its factorization.

18740668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685171 (or 4685169 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18740668 is about 4329.0493182684. The cubic root of 18740668 is about 265.6205606271.

The spelling of 18740668 in words is "eighteen million, seven hundred forty thousand, six hundred sixty-eight".