19688838697 has 16 divisors (see below), whose sum is σ = 21726019584. Its totient is φ = 17693440000.

The previous prime is 19688838683. The next prime is 19688838713. The reversal of 19688838697 is 79683888691.

It is a cyclic number.

It is not a de Polignac number, because 19688838697 - 2¹¹ = 19688836649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19688838797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698328 + ... + 725974.

It is an arithmetic number, because the mean of its divisors is an integer number (1357876224).

Almost surely, 2^19688838697 is an apocalyptic number.

It is an amenable number.

19688838697 is a deficient number, since it is larger than the sum of its proper divisors (2037180887).

19688838697 is a wasteful number, since it uses less digits than its factorization.

19688838697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28400.

The product of its digits is 250822656, while the sum is 73.

The spelling of 19688838697 in words is "nineteen billion, six hundred eighty-eight million, eight hundred thirty-eight thousand, six hundred ninety-seven".