19660095613 has 2 divisors, whose sum is σ = 19660095614. Its totient is φ = 19660095612.

The previous prime is 19660095517. The next prime is 19660095617. The reversal of 19660095613 is 31659006691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13046665284 + 6613430329 = 114222^2 + 81323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19660095613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19660095617) 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, 9830047806 + 9830047807.

It is an arithmetic number, because the mean of its divisors is an integer number (9830047807).

Almost surely, 2^19660095613 is an apocalyptic number.

It is an amenable number.

19660095613 is a deficient number, since it is larger than the sum of its proper divisors (1).

19660095613 is an equidigital number, since it uses as much as digits as its factorization.

19660095613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 19660095613 in words is "nineteen billion, six hundred sixty million, ninety-five thousand, six hundred thirteen".