30518872686 has 20 divisors (see below), whose sum is σ = 68384881752. Its totient is φ = 10172957508.

The previous prime is 30518872639. The next prime is 30518872687. The reversal of 30518872686 is 68627881503.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30518872687) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 94193890 + ... + 94194213.

Almost surely, 2^30518872686 is an apocalyptic number.

30518872686 is an abundant number, since it is smaller than the sum of its proper divisors (37866009066).

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

30518872686 is a wasteful number, since it uses less digits than its factorization.

30518872686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188388117 (or 188388108 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 30518872686 in words is "thirty billion, five hundred eighteen million, eight hundred seventy-two thousand, six hundred eighty-six".