19196518097 has 2 divisors, whose sum is σ = 19196518098. Its totient is φ = 19196518096.

The previous prime is 19196518087. The next prime is 19196518123. The reversal of 19196518097 is 79081569191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15217936321 + 3978581776 = 123361^2 + 63076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19196518097 is a prime.

It is not a weakly prime, because it can be changed into another prime (19196518087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9598259048 + 9598259049.

It is an arithmetic number, because the mean of its divisors is an integer number (9598259049).

Almost surely, 2^19196518097 is an apocalyptic number.

It is an amenable number.

19196518097 is a deficient number, since it is larger than the sum of its proper divisors (1).

19196518097 is an equidigital number, since it uses as much as digits as its factorization.

19196518097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 56.

The spelling of 19196518097 in words is "nineteen billion, one hundred ninety-six million, five hundred eighteen thousand, ninety-seven".