19686516272 has 80 divisors (see below), whose sum is σ = 39921944832. Its totient is φ = 9393684480.

The previous prime is 19686516257. The next prime is 19686516301. The reversal of 19686516272 is 27261568691.

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, 17945228 + ... + 17946324.

Almost surely, 2^19686516272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19686516272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19960972416).

19686516272 is an abundant number, since it is smaller than the sum of its proper divisors (20235428560).

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

19686516272 is a wasteful number, since it uses less digits than its factorization.

19686516272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1600 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 19686516272 in words is "nineteen billion, six hundred eighty-six million, five hundred sixteen thousand, two hundred seventy-two".