19849255903 has 2 divisors, whose sum is σ = 19849255904. Its totient is φ = 19849255902.

The previous prime is 19849255819. The next prime is 19849255919. The reversal of 19849255903 is 30955294891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19849255903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19849255973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9924627951 + 9924627952.

It is an arithmetic number, because the mean of its divisors is an integer number (9924627952).

Almost surely, 2^19849255903 is an apocalyptic number.

19849255903 is a deficient number, since it is larger than the sum of its proper divisors (1).

19849255903 is an equidigital number, since it uses as much as digits as its factorization.

19849255903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 19849255903 in words is "nineteen billion, eight hundred forty-nine million, two hundred fifty-five thousand, nine hundred three".