19696969697 has 8 divisors (see below), whose sum is σ = 19810714560. Its totient is φ = 19583279280.

The previous prime is 19696969687. The next prime is 19696969711. The reversal of 19696969697 is 79696969691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19696969697 - 2⁴ = 19696969681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19696969687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879278 + ... + 901400.

It is an arithmetic number, because the mean of its divisors is an integer number (2476339320).

Almost surely, 2^19696969697 is an apocalyptic number.

It is an amenable number.

19696969697 is a deficient number, since it is larger than the sum of its proper divisors (113744863).

19696969697 is a wasteful number, since it uses less digits than its factorization.

19696969697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27223.

The product of its digits is 535692528, while the sum is 77.

The spelling of 19696969697 in words is "nineteen billion, six hundred ninety-six million, nine hundred sixty-nine thousand, six hundred ninety-seven".