19705563103 has 2 divisors, whose sum is σ = 19705563104. Its totient is φ = 19705563102.

The previous prime is 19705563089. The next prime is 19705563113. The reversal of 19705563103 is 30136550791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19705563103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19705563113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9852781551 + 9852781552.

It is an arithmetic number, because the mean of its divisors is an integer number (9852781552).

Almost surely, 2^19705563103 is an apocalyptic number.

19705563103 is a deficient number, since it is larger than the sum of its proper divisors (1).

19705563103 is an equidigital number, since it uses as much as digits as its factorization.

19705563103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 40.

The spelling of 19705563103 in words is "nineteen billion, seven hundred five million, five hundred sixty-three thousand, one hundred three".