19109468168 has 32 divisors (see below), whose sum is σ = 40957747200. Its totient is φ = 8187994752.

The previous prime is 19109468129. The next prime is 19109468179. The reversal of 19109468168 is 86186490191.

It is a Cunningham number, because it is equal to 138237²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241913 + ... + 311031.

It is an arithmetic number, because the mean of its divisors is an integer number (1279929600).

Almost surely, 2^19109468168 is an apocalyptic number.

It is an amenable number.

19109468168 is an abundant number, since it is smaller than the sum of its proper divisors (21848279032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19109468168 is a wasteful number, since it uses less digits than its factorization.

19109468168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74069 (or 74065 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 19109468168 in words is "nineteen billion, one hundred nine million, four hundred sixty-eight thousand, one hundred sixty-eight".