19995610317 has 16 divisors (see below), whose sum is σ = 28336488960. Its totient is φ = 12506193072.

The previous prime is 19995610309. The next prime is 19995610373. The reversal of 19995610317 is 71301659991.

It is a happy number.

It is not a de Polignac number, because 19995610317 - 2³ = 19995610309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19995610317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19995610387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1697043 + ... + 1708784.

It is an arithmetic number, because the mean of its divisors is an integer number (1771030560).

Almost surely, 2^19995610317 is an apocalyptic number.

It is an amenable number.

19995610317 is a deficient number, since it is larger than the sum of its proper divisors (8340878643).

19995610317 is a wasteful number, since it uses less digits than its factorization.

19995610317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405952.

The product of its (nonzero) digits is 459270, while the sum is 51.

The spelling of 19995610317 in words is "nineteen billion, nine hundred ninety-five million, six hundred ten thousand, three hundred seventeen".