18678505612 has 48 divisors (see below), whose sum is σ = 36181788160. Its totient is φ = 8381221632.

The previous prime is 18678505589. The next prime is 18678505631. The reversal of 18678505612 is 21650587681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3069589 + ... + 3075667.

Almost surely, 2^18678505612 is an apocalyptic number.

It is an amenable number.

18678505612 is a deficient number, since it is larger than the sum of its proper divisors (17503282548).

18678505612 is a wasteful number, since it uses less digits than its factorization.

18678505612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730 (or 7728 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 18678505612 in words is "eighteen billion, six hundred seventy-eight million, five hundred five thousand, six hundred twelve".