19568848987 has 2 divisors, whose sum is σ = 19568848988. Its totient is φ = 19568848986.

The previous prime is 19568848969. The next prime is 19568849011. The reversal of 19568848987 is 78984886591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19568848987 is a prime.

It is not a weakly prime, because it can be changed into another prime (19568848907) 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, 9784424493 + 9784424494.

It is an arithmetic number, because the mean of its divisors is an integer number (9784424494).

Almost surely, 2^19568848987 is an apocalyptic number.

19568848987 is a deficient number, since it is larger than the sum of its proper divisors (1).

19568848987 is an equidigital number, since it uses as much as digits as its factorization.

19568848987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 278691840, while the sum is 73.

The spelling of 19568848987 in words is "nineteen billion, five hundred sixty-eight million, eight hundred forty-eight thousand, nine hundred eighty-seven".