19619861713 has 2 divisors, whose sum is σ = 19619861714. Its totient is φ = 19619861712.

The previous prime is 19619861707. The next prime is 19619861773. The reversal of 19619861713 is 31716891691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19446860304 + 173001409 = 139452^2 + 13153^2 .

It is a cyclic number.

It is not a de Polignac number, because 19619861713 - 2⁹ = 19619861201 is a prime.

It is not a weakly prime, because it can be changed into another prime (19619861773) 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, 9809930856 + 9809930857.

It is an arithmetic number, because the mean of its divisors is an integer number (9809930857).

Almost surely, 2^19619861713 is an apocalyptic number.

It is an amenable number.

19619861713 is a deficient number, since it is larger than the sum of its proper divisors (1).

19619861713 is an equidigital number, since it uses as much as digits as its factorization.

19619861713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 52.

The spelling of 19619861713 in words is "nineteen billion, six hundred nineteen million, eight hundred sixty-one thousand, seven hundred thirteen".