19597253099 has 2 divisors, whose sum is σ = 19597253100. Its totient is φ = 19597253098.

The previous prime is 19597252951. The next prime is 19597253111. The reversal of 19597253099 is 99035279591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19597253099 is a prime.

It is not a weakly prime, because it can be changed into another prime (19597253399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9798626549 + 9798626550.

It is an arithmetic number, because the mean of its divisors is an integer number (9798626550).

Almost surely, 2^19597253099 is an apocalyptic number.

19597253099 is a deficient number, since it is larger than the sum of its proper divisors (1).

19597253099 is an equidigital number, since it uses as much as digits as its factorization.

19597253099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6889050, while the sum is 59.

The spelling of 19597253099 in words is "nineteen billion, five hundred ninety-seven million, two hundred fifty-three thousand, ninety-nine".