19117398894 has 16 divisors (see below), whose sum is σ = 41710688640. Its totient is φ = 5793151160.

The previous prime is 19117398887. The next prime is 19117398901. The reversal of 19117398894 is 49889371191.

It is an interprime number because it is at equal distance from previous prime (19117398887) and next prime (19117398901).

It is a congruent number.

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, 144828714 + ... + 144828845.

It is an arithmetic number, because the mean of its divisors is an integer number (2606918040).

Almost surely, 2^19117398894 is an apocalyptic number.

19117398894 is an abundant number, since it is smaller than the sum of its proper divisors (22593289746).

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

19117398894 is a wasteful number, since it uses less digits than its factorization.

19117398894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289657575.

The product of its digits is 3919104, while the sum is 60.

The spelling of 19117398894 in words is "nineteen billion, one hundred seventeen million, three hundred ninety-eight thousand, eight hundred ninety-four".