19996107697 has 2 divisors, whose sum is σ = 19996107698. Its totient is φ = 19996107696.

The previous prime is 19996107671. The next prime is 19996107707. The reversal of 19996107697 is 79670169991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19265162401 + 730945296 = 138799^2 + 27036^2 .

It is an emirp because it is prime and its reverse (79670169991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19996107697 - 2¹⁹ = 19995583409 is a prime.

It is not a weakly prime, because it can be changed into another prime (19996107097) 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 as a sum of consecutive naturals, namely, 9998053848 + 9998053849.

It is an arithmetic number, because the mean of its divisors is an integer number (9998053849).

Almost surely, 2^19996107697 is an apocalyptic number.

It is an amenable number.

19996107697 is a deficient number, since it is larger than the sum of its proper divisors (1).

19996107697 is an equidigital number, since it uses as much as digits as its factorization.

19996107697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11573604, while the sum is 64.

The spelling of 19996107697 in words is "nineteen billion, nine hundred ninety-six million, one hundred seven thousand, six hundred ninety-seven".