19657957913 has 8 divisors (see below), whose sum is σ = 21447070176. Its totient is φ = 17869183200.

The previous prime is 19657957909. The next prime is 19657957933. The reversal of 19657957913 is 31975975691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19657957913 - 2² = 19657957909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19657957933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46178 + ... + 203588.

It is an arithmetic number, because the mean of its divisors is an integer number (2680883772).

Almost surely, 2^19657957913 is an apocalyptic number.

It is an amenable number.

19657957913 is a deficient number, since it is larger than the sum of its proper divisors (1789112263).

19657957913 is a wasteful number, since it uses less digits than its factorization.

19657957913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168775.

The product of its digits is 16074450, while the sum is 62.

The spelling of 19657957913 in words is "nineteen billion, six hundred fifty-seven million, nine hundred fifty-seven thousand, nine hundred thirteen".