19983942242833 has 2 divisors, whose sum is σ = 19983942242834. Its totient is φ = 19983942242832.

The previous prime is 19983942242819. The next prime is 19983942242837. The reversal of 19983942242833 is 33824224938991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15127066758609 + 4856875484224 = 3889353^2 + 2203832^2 .

It is a cyclic number.

It is not a de Polignac number, because 19983942242833 - 2⁹ = 19983942242321 is a prime.

It is not a weakly prime, because it can be changed into another prime (19983942242837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991971121416 + 9991971121417.

It is an arithmetic number, because the mean of its divisors is an integer number (9991971121417).

Almost surely, 2^{19983942242833} is an apocalyptic number.

It is an amenable number.

19983942242833 is a deficient number, since it is larger than the sum of its proper divisors (1).

19983942242833 is an equidigital number, since it uses as much as digits as its factorization.

19983942242833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161243136, while the sum is 67.

The spelling of 19983942242833 in words is "nineteen trillion, nine hundred eighty-three billion, nine hundred forty-two million, two hundred forty-two thousand, eight hundred thirty-three".