19787694725 has 12 divisors (see below), whose sum is σ = 24538887744. Its totient is φ = 15828771120.

The previous prime is 19787694713. The next prime is 19787694727. The reversal of 19787694725 is 52749678791.

It is not a de Polignac number, because 19787694725 - 2⁸ = 19787694469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19787694727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333782 + ... + 388568.

It is an arithmetic number, because the mean of its divisors is an integer number (2044907312).

Almost surely, 2^19787694725 is an apocalyptic number.

It is an amenable number.

19787694725 is a deficient number, since it is larger than the sum of its proper divisors (4751193019).

19787694725 is a wasteful number, since it uses less digits than its factorization.

19787694725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69244 (or 69239 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 65.

The spelling of 19787694725 in words is "nineteen billion, seven hundred eighty-seven million, six hundred ninety-four thousand, seven hundred twenty-five".