18631730456 has 16 divisors (see below), whose sum is σ = 36139132800. Its totient is φ = 8994628384.

The previous prime is 18631730449. The next prime is 18631730477. The reversal of 18631730456 is 65403713681.

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, 40154360 + ... + 40154823.

It is an arithmetic number, because the mean of its divisors is an integer number (2258695800).

Almost surely, 2^18631730456 is an apocalyptic number.

It is an amenable number.

18631730456 is a deficient number, since it is larger than the sum of its proper divisors (17507402344).

18631730456 is a wasteful number, since it uses less digits than its factorization.

18631730456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80309218 (or 80309214 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 18631730456 in words is "eighteen billion, six hundred thirty-one million, seven hundred thirty thousand, four hundred fifty-six".