19163217997 has 16 divisors (see below), whose sum is σ = 23902699392. Its totient is φ = 14925568320.

The previous prime is 19163217959. The next prime is 19163218027. The reversal of 19163217997 is 79971236191.

It is a cyclic number.

It is not a de Polignac number, because 19163217997 - 2¹⁵ = 19163185229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19163217917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116623 + ... + 227875.

It is an arithmetic number, because the mean of its divisors is an integer number (1493918712).

Almost surely, 2^19163217997 is an apocalyptic number.

It is an amenable number.

19163217997 is a deficient number, since it is larger than the sum of its proper divisors (4739481395).

19163217997 is a wasteful number, since it uses less digits than its factorization.

19163217997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113508.

The product of its digits is 1285956, while the sum is 55.

The spelling of 19163217997 in words is "nineteen billion, one hundred sixty-three million, two hundred seventeen thousand, nine hundred ninety-seven".