19634255099 has 2 divisors, whose sum is σ = 19634255100. Its totient is φ = 19634255098.

The previous prime is 19634255041. The next prime is 19634255117. The reversal of 19634255099 is 99055243691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19634255099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19634255099.

It is not a weakly prime, because it can be changed into another prime (19634255699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9817127549 + 9817127550.

It is an arithmetic number, because the mean of its divisors is an integer number (9817127550).

Almost surely, 2^19634255099 is an apocalyptic number.

19634255099 is a deficient number, since it is larger than the sum of its proper divisors (1).

19634255099 is an equidigital number, since it uses as much as digits as its factorization.

19634255099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 19634255099 in words is "nineteen billion, six hundred thirty-four million, two hundred fifty-five thousand, ninety-nine".