19131691519 has 2 divisors, whose sum is σ = 19131691520. Its totient is φ = 19131691518.

The previous prime is 19131691487. The next prime is 19131691531. The reversal of 19131691519 is 91519613191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19131691519 - 2⁵ = 19131691487 is a prime.

It is a super-2 number, since 2×19131691519² (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 (19131691619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9565845759 + 9565845760.

It is an arithmetic number, because the mean of its divisors is an integer number (9565845760).

Almost surely, 2^19131691519 is an apocalyptic number.

19131691519 is a deficient number, since it is larger than the sum of its proper divisors (1).

19131691519 is an equidigital number, since it uses as much as digits as its factorization.

19131691519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 46.

The spelling of 19131691519 in words is "nineteen billion, one hundred thirty-one million, six hundred ninety-one thousand, five hundred nineteen".