19931259172 has 12 divisors (see below), whose sum is σ = 38050585776. Its totient is φ = 9059663240.

The previous prime is 19931259167. The next prime is 19931259209. The reversal of 19931259172 is 27195213991.

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, 226491538 + ... + 226491625.

It is an arithmetic number, because the mean of its divisors is an integer number (3170882148).

Almost surely, 2^19931259172 is an apocalyptic number.

It is an amenable number.

19931259172 is a deficient number, since it is larger than the sum of its proper divisors (18119326604).

19931259172 is a wasteful number, since it uses less digits than its factorization.

19931259172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452983178 (or 452983176 counting only the distinct ones).

The product of its digits is 306180, while the sum is 49.

The spelling of 19931259172 in words is "nineteen billion, nine hundred thirty-one million, two hundred fifty-nine thousand, one hundred seventy-two".