18718712 has 16 divisors (see below), whose sum is σ = 35208600. Its totient is φ = 9329760.

The previous prime is 18718709. The next prime is 18718723. The reversal of 18718712 is 21781781.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887 + ... + 6182.

Almost surely, 2^18718712 is an apocalyptic number.

It is an amenable number.

18718712 is a deficient number, since it is larger than the sum of its proper divisors (16489888).

18718712 is a wasteful number, since it uses less digits than its factorization.

18718712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406 (or 7402 counting only the distinct ones).

The product of its digits is 6272, while the sum is 35.

The square root of 18718712 is about 4326.5126834438. The cubic root of 18718712 is about 265.5167890854.

The spelling of 18718712 in words is "eighteen million, seven hundred eighteen thousand, seven hundred twelve".