19647600943 has 2 divisors, whose sum is σ = 19647600944. Its totient is φ = 19647600942.

The previous prime is 19647600919. The next prime is 19647600953. The reversal of 19647600943 is 34900674691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19647600943 - 2²¹ = 19645503791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19647600953) 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, 9823800471 + 9823800472.

It is an arithmetic number, because the mean of its divisors is an integer number (9823800472).

Almost surely, 2^19647600943 is an apocalyptic number.

19647600943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19647600943 is an equidigital number, since it uses as much as digits as its factorization.

19647600943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 19647600943 in words is "nineteen billion, six hundred forty-seven million, six hundred thousand, nine hundred forty-three".