19968044533 has 2 divisors, whose sum is σ = 19968044534. Its totient is φ = 19968044532.

The previous prime is 19968044531. The next prime is 19968044549. The reversal of 19968044533 is 33544086991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18828779524 + 1139265009 = 137218^2 + 33753^2 .

It is a cyclic number.

It is not a de Polignac number, because 19968044533 - 2¹ = 19968044531 is a prime.

Together with 19968044531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19968044531) 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, 9984022266 + 9984022267.

It is an arithmetic number, because the mean of its divisors is an integer number (9984022267).

Almost surely, 2^19968044533 is an apocalyptic number.

It is an amenable number.

19968044533 is a deficient number, since it is larger than the sum of its proper divisors (1).

19968044533 is an equidigital number, since it uses as much as digits as its factorization.

19968044533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 19968044533 in words is "nineteen billion, nine hundred sixty-eight million, forty-four thousand, five hundred thirty-three".