19985759611 has 2 divisors, whose sum is σ = 19985759612. Its totient is φ = 19985759610.

The previous prime is 19985759581. The next prime is 19985759639. The reversal of 19985759611 is 11695758991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19985759611 - 2⁵ = 19985759579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19985759611.

It is not a weakly prime, because it can be changed into another prime (19985750611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992879805 + 9992879806.

It is an arithmetic number, because the mean of its divisors is an integer number (9992879806).

Almost surely, 2^19985759611 is an apocalyptic number.

19985759611 is a deficient number, since it is larger than the sum of its proper divisors (1).

19985759611 is an equidigital number, since it uses as much as digits as its factorization.

19985759611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 61.

The spelling of 19985759611 in words is "nineteen billion, nine hundred eighty-five million, seven hundred fifty-nine thousand, six hundred eleven".