19109865713 has 2 divisors, whose sum is σ = 19109865714. Its totient is φ = 19109865712.

The previous prime is 19109865701. The next prime is 19109865737. The reversal of 19109865713 is 31756890191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16726766224 + 2383099489 = 129332^2 + 48817^2 .

It is a cyclic number.

It is not a de Polignac number, because 19109865713 - 2¹⁰ = 19109864689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19109865763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9554932856 + 9554932857.

It is an arithmetic number, because the mean of its divisors is an integer number (9554932857).

Almost surely, 2^19109865713 is an apocalyptic number.

It is an amenable number.

19109865713 is a deficient number, since it is larger than the sum of its proper divisors (1).

19109865713 is an equidigital number, since it uses as much as digits as its factorization.

19109865713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 19109865713 in words is "nineteen billion, one hundred nine million, eight hundred sixty-five thousand, seven hundred thirteen".