19317916765 has 32 divisors (see below), whose sum is σ = 28158451200. Its totient is φ = 12419856384.

The previous prime is 19317916763. The next prime is 19317916819. The reversal of 19317916765 is 56761971391.

It is a cyclic number.

It is not a de Polignac number, because 19317916765 - 2¹ = 19317916763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19317916763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94761 + ... + 218209.

It is an arithmetic number, because the mean of its divisors is an integer number (879951600).

Almost surely, 2^19317916765 is an apocalyptic number.

It is an amenable number.

19317916765 is a deficient number, since it is larger than the sum of its proper divisors (8840534435).

19317916765 is a wasteful number, since it uses less digits than its factorization.

19317916765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123741.

The product of its digits is 2143260, while the sum is 55.

The spelling of 19317916765 in words is "nineteen billion, three hundred seventeen million, nine hundred sixteen thousand, seven hundred sixty-five".