19509019319 has 2 divisors, whose sum is σ = 19509019320. Its totient is φ = 19509019318.

The previous prime is 19509019261. The next prime is 19509019333. The reversal of 19509019319 is 91391090591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19509019319 - 2¹² = 19509015223 is a prime.

It is a super-2 number, since 2×19509019319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19509019379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9754509659 + 9754509660.

It is an arithmetic number, because the mean of its divisors is an integer number (9754509660).

Almost surely, 2^19509019319 is an apocalyptic number.

19509019319 is a deficient number, since it is larger than the sum of its proper divisors (1).

19509019319 is an equidigital number, since it uses as much as digits as its factorization.

19509019319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98415, while the sum is 47.

The spelling of 19509019319 in words is "nineteen billion, five hundred nine million, nineteen thousand, three hundred nineteen".