19196123917 has 2 divisors, whose sum is σ = 19196123918. Its totient is φ = 19196123916.

The previous prime is 19196123899. The next prime is 19196123923. The reversal of 19196123917 is 71932169191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11362280836 + 7833843081 = 106594^2 + 88509^2 .

It is a cyclic number.

It is not a de Polignac number, because 19196123917 - 2¹⁵ = 19196091149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19196123927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9598061958 + 9598061959.

It is an arithmetic number, because the mean of its divisors is an integer number (9598061959).

Almost surely, 2^19196123917 is an apocalyptic number.

It is an amenable number.

19196123917 is a deficient number, since it is larger than the sum of its proper divisors (1).

19196123917 is an equidigital number, since it uses as much as digits as its factorization.

19196123917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 49.

The spelling of 19196123917 in words is "nineteen billion, one hundred ninety-six million, one hundred twenty-three thousand, nine hundred seventeen".