19887915796 has 12 divisors (see below), whose sum is σ = 39775831648. Its totient is φ = 8523392472.

The previous prime is 19887915791. The next prime is 19887915857. The reversal of 19887915796 is 69751978891.

19887915796 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19887915791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355141326 + ... + 355141381.

Almost surely, 2^19887915796 is an apocalyptic number.

It is an amenable number.

19887915796 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19887915796 is a wasteful number, since it uses less digits than its factorization.

19887915796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710282718 (or 710282716 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 70.

The spelling of 19887915796 in words is "nineteen billion, eight hundred eighty-seven million, nine hundred fifteen thousand, seven hundred ninety-six".