18020679836568 has 16 divisors (see below), whose sum is σ = 45051699591480. Its totient is φ = 6006893278848.

The previous prime is 18020679836567. The next prime is 18020679836587. The reversal of 18020679836568 is 86563897602081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020679836561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375430829905 + ... + 375430829952.

Almost surely, 2^{18020679836568} is an apocalyptic number.

It is an amenable number.

18020679836568 is an abundant number, since it is smaller than the sum of its proper divisors (27031019754912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18020679836568 is a wasteful number, since it uses less digits than its factorization.

18020679836568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750861659866 (or 750861659862 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 69.

The spelling of 18020679836568 in words is "eighteen trillion, twenty billion, six hundred seventy-nine million, eight hundred thirty-six thousand, five hundred sixty-eight".