13620971682 has 12 divisors (see below), whose sum is σ = 29512105350. Its totient is φ = 4540323888.

The previous prime is 13620971681. The next prime is 13620971699. The reversal of 13620971682 is 28617902631.

13620971682 is a `hidden beast` number, since 1 + 3 + 620 + 9 + 7 + 16 + 8 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13463192961 + 157778721 = 116031^2 + 12561^2 .

It is not an unprimeable number, because it can be changed into a prime (13620971681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378360307 + ... + 378360342.

Almost surely, 2^13620971682 is an apocalyptic number.

13620971682 is an abundant number, since it is smaller than the sum of its proper divisors (15891133668).

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

13620971682 is a wasteful number, since it uses less digits than its factorization.

13620971682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756720657 (or 756720654 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 13620971682 in words is "thirteen billion, six hundred twenty million, nine hundred seventy-one thousand, six hundred eighty-two".