18323280688 has 10 divisors (see below), whose sum is σ = 35501356364. Its totient is φ = 9161640336.

The previous prime is 18323280683. The next prime is 18323280691. The reversal of 18323280688 is 88608232381.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18323280683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572602506 + ... + 572602537.

Almost surely, 2^18323280688 is an apocalyptic number.

It is an amenable number.

18323280688 is a deficient number, since it is larger than the sum of its proper divisors (17178075676).

18323280688 is a wasteful number, since it uses less digits than its factorization.

18323280688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145205051 (or 1145205045 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 18323280688 in words is "eighteen billion, three hundred twenty-three million, two hundred eighty thousand, six hundred eighty-eight".