19934835935857 has 2 divisors, whose sum is σ = 19934835935858. Its totient is φ = 19934835935856.

The previous prime is 19934835935837. The next prime is 19934835935867. The reversal of 19934835935857 is 75853953843991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18894009532176 + 1040826403681 = 4346724^2 + 1020209^2 .

It is a cyclic number.

It is not a de Polignac number, because 19934835935857 - 2¹¹ = 19934835933809 is a prime.

It is not a weakly prime, because it can be changed into another prime (19934835935827) 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, 9967417967928 + 9967417967929.

It is an arithmetic number, because the mean of its divisors is an integer number (9967417967929).

Almost surely, 2^{19934835935857} is an apocalyptic number.

It is an amenable number.

19934835935857 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934835935857 is an equidigital number, since it uses as much as digits as its factorization.

19934835935857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992000, while the sum is 79.

The spelling of 19934835935857 in words is "nineteen trillion, nine hundred thirty-four billion, eight hundred thirty-five million, nine hundred thirty-five thousand, eight hundred fifty-seven".