18697716 has 30 divisors (see below), whose sum is σ = 48880370. Its totient is φ = 6232464.

The previous prime is 18697703. The next prime is 18697727. The reversal of 18697716 is 61779681.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 7001316 = 3420^2 + 2646^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28531 + ... + 29178.

Almost surely, 2^18697716 is an apocalyptic number.

It is an amenable number.

18697716 is an abundant number, since it is smaller than the sum of its proper divisors (30182654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18697716 is a wasteful number, since it uses less digits than its factorization.

18697716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57725 (or 57714 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 18697716 is about 4324.0855680710. The cubic root of 18697716 is about 265.4174789025.

The spelling of 18697716 in words is "eighteen million, six hundred ninety-seven thousand, seven hundred sixteen".