19796407243 has 2 divisors, whose sum is σ = 19796407244. Its totient is φ = 19796407242.

The previous prime is 19796407229. The next prime is 19796407259. The reversal of 19796407243 is 34270469791.

It is a weak prime.

It is an emirp because it is prime and its reverse (34270469791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19796407243 is a prime.

It is a super-2 number, since 2×19796407243² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19796407283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9898203621 + 9898203622.

It is an arithmetic number, because the mean of its divisors is an integer number (9898203622).

Almost surely, 2^19796407243 is an apocalyptic number.

19796407243 is a deficient number, since it is larger than the sum of its proper divisors (1).

19796407243 is an equidigital number, since it uses as much as digits as its factorization.

19796407243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 19796407243 in words is "nineteen billion, seven hundred ninety-six million, four hundred seven thousand, two hundred forty-three".