19497326914517 has 2 divisors, whose sum is σ = 19497326914518. Its totient is φ = 19497326914516.

The previous prime is 19497326914511. The next prime is 19497326914567. The reversal of 19497326914517 is 71541962379491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19208856949681 + 288469964836 = 4382791^2 + 537094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19497326914517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19497326914511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748663457258 + 9748663457259.

It is an arithmetic number, because the mean of its divisors is an integer number (9748663457259).

Almost surely, 2^{19497326914517} is an apocalyptic number.

It is an amenable number.

19497326914517 is a deficient number, since it is larger than the sum of its proper divisors (1).

19497326914517 is an equidigital number, since it uses as much as digits as its factorization.

19497326914517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102876480, while the sum is 68.

The spelling of 19497326914517 in words is "nineteen trillion, four hundred ninety-seven billion, three hundred twenty-six million, nine hundred fourteen thousand, five hundred seventeen".