18678471268 has 24 divisors (see below), whose sum is σ = 34733311704. Its totient is φ = 8758579200.

The previous prime is 18678471221. The next prime is 18678471289. The reversal of 18678471268 is 86217487681.

It can be written as a sum of positive squares in 4 ways, for example, as 10658910564 + 8019560704 = 103242^2 + 89552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469653 + ... + 507868.

It is an arithmetic number, because the mean of its divisors is an integer number (1447221321).

Almost surely, 2^18678471268 is an apocalyptic number.

It is an amenable number.

18678471268 is a deficient number, since it is larger than the sum of its proper divisors (16054840436).

18678471268 is a wasteful number, since it uses less digits than its factorization.

18678471268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977823 (or 977821 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 58.

The spelling of 18678471268 in words is "eighteen billion, six hundred seventy-eight million, four hundred seventy-one thousand, two hundred sixty-eight".