19849809712 has 20 divisors (see below), whose sum is σ = 38689304976. Its totient is φ = 9865472960.

The previous prime is 19849809709. The next prime is 19849809767. The reversal of 19849809712 is 21790894891.

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, 3711739 + ... + 3717082.

Almost surely, 2^19849809712 is an apocalyptic number.

It is an amenable number.

19849809712 is a deficient number, since it is larger than the sum of its proper divisors (18839495264).

19849809712 is a wasteful number, since it uses less digits than its factorization.

19849809712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428996 (or 7428990 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 19849809712 in words is "nineteen billion, eight hundred forty-nine million, eight hundred nine thousand, seven hundred twelve".