19191092099 has 2 divisors, whose sum is σ = 19191092100. Its totient is φ = 19191092098.

The previous prime is 19191092083. The next prime is 19191092111. The reversal of 19191092099 is 99029019191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19191092099 - 2⁴ = 19191092083 is a prime.

It is not a weakly prime, because it can be changed into another prime (19191092059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9595546049 + 9595546050.

It is an arithmetic number, because the mean of its divisors is an integer number (9595546050).

Almost surely, 2^19191092099 is an apocalyptic number.

19191092099 is a deficient number, since it is larger than the sum of its proper divisors (1).

19191092099 is an equidigital number, since it uses as much as digits as its factorization.

19191092099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 19191092099 in words is "nineteen billion, one hundred ninety-one million, ninety-two thousand, ninety-nine".