19796590840913 has 2 divisors, whose sum is σ = 19796590840914. Its totient is φ = 19796590840912.

The previous prime is 19796590840867. The next prime is 19796590840921. The reversal of 19796590840913 is 31904809569791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10434043451329 + 9362547389584 = 3230177^2 + 3059828^2 .

It is a cyclic number.

It is not a de Polignac number, because 19796590840913 - 2⁸ = 19796590840657 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 (19796590840933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9898295420456 + 9898295420457.

It is an arithmetic number, because the mean of its divisors is an integer number (9898295420457).

Almost surely, 2^{19796590840913} is an apocalyptic number.

It is an amenable number.

19796590840913 is a deficient number, since it is larger than the sum of its proper divisors (1).

19796590840913 is an equidigital number, since it uses as much as digits as its factorization.

19796590840913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132269760, while the sum is 71.

The spelling of 19796590840913 in words is "nineteen trillion, seven hundred ninety-six billion, five hundred ninety million, eight hundred forty thousand, nine hundred thirteen".