18885934456 has 16 divisors (see below), whose sum is σ = 36011316600. Its totient is φ = 9282916704.

The previous prime is 18885934439. The next prime is 18885934489. The reversal of 18885934456 is 65443958881.

It is a junction number, because it is equal to n+sod(n) for n = 18885934394 and 18885934403.

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, 20005815 + ... + 20006758.

Almost surely, 2^18885934456 is an apocalyptic number.

It is an amenable number.

18885934456 is a deficient number, since it is larger than the sum of its proper divisors (17125382144).

18885934456 is a wasteful number, since it uses less digits than its factorization.

18885934456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40012638 (or 40012634 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 61.

The spelling of 18885934456 in words is "eighteen billion, eight hundred eighty-five million, nine hundred thirty-four thousand, four hundred fifty-six".