19509475103 has 2 divisors, whose sum is σ = 19509475104. Its totient is φ = 19509475102.

The previous prime is 19509475087. The next prime is 19509475123. The reversal of 19509475103 is 30157490591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19509475103 - 2⁴ = 19509475087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19509475123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9754737551 + 9754737552.

It is an arithmetic number, because the mean of its divisors is an integer number (9754737552).

Almost surely, 2^19509475103 is an apocalyptic number.

19509475103 is a deficient number, since it is larger than the sum of its proper divisors (1).

19509475103 is an equidigital number, since it uses as much as digits as its factorization.

19509475103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 19509475103 in words is "nineteen billion, five hundred nine million, four hundred seventy-five thousand, one hundred three".