19122916172 has 12 divisors (see below), whose sum is σ = 33505574760. Its totient is φ = 9549894816.

The previous prime is 19122916171. The next prime is 19122916199. The reversal of 19122916172 is 27161922191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19122916171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887097 + ... + 2893712.

It is an arithmetic number, because the mean of its divisors is an integer number (2792131230).

Almost surely, 2^19122916172 is an apocalyptic number.

It is an amenable number.

19122916172 is a deficient number, since it is larger than the sum of its proper divisors (14382658588).

19122916172 is a wasteful number, since it uses less digits than its factorization.

19122916172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5781640 (or 5781638 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The spelling of 19122916172 in words is "nineteen billion, one hundred twenty-two million, nine hundred sixteen thousand, one hundred seventy-two".