19696969916 has 12 divisors (see below), whose sum is σ = 37121212632. Its totient is φ = 9090909168.

The previous prime is 19696969891. The next prime is 19696969961. The reversal of 19696969916 is 61996969691.

It is a self number, because there is not a number n which added to its sum of digits gives 19696969916.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 189393890 + ... + 189393993.

It is an arithmetic number, because the mean of its divisors is an integer number (3093434386).

Almost surely, 2^19696969916 is an apocalyptic number.

It is an amenable number.

19696969916 is a deficient number, since it is larger than the sum of its proper divisors (17424242716).

19696969916 is a wasteful number, since it uses less digits than its factorization.

19696969916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378787900 (or 378787898 counting only the distinct ones).

The product of its digits is 76527504, while the sum is 71.

The spelling of 19696969916 in words is "nineteen billion, six hundred ninety-six million, nine hundred sixty-nine thousand, nine hundred sixteen".