19117992072 has 16 divisors (see below), whose sum is σ = 47794980240. Its totient is φ = 6372664016.

The previous prime is 19117992059. The next prime is 19117992097. The reversal of 19117992072 is 27029971191.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398291478 + ... + 398291525.

It is an arithmetic number, because the mean of its divisors is an integer number (2987186265).

Almost surely, 2^19117992072 is an apocalyptic number.

19117992072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19117992072 is an abundant number, since it is smaller than the sum of its proper divisors (28676988168).

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

19117992072 is a wasteful number, since it uses less digits than its factorization.

19117992072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796583012 (or 796583008 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 48.

The spelling of 19117992072 in words is "nineteen billion, one hundred seventeen million, nine hundred ninety-two thousand, seventy-two".