19690835719 has 4 divisors (see below), whose sum is σ = 20326024000. Its totient is φ = 19055647440.

The previous prime is 19690835683. The next prime is 19690835743. The reversal of 19690835719 is 91753809691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19690835719 - 2³³ = 11100901127 is a prime.

It is a super-2 number, since 2×19690835719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690832719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317594094 + ... + 317594155.

It is an arithmetic number, because the mean of its divisors is an integer number (5081506000).

Almost surely, 2^19690835719 is an apocalyptic number.

19690835719 is a deficient number, since it is larger than the sum of its proper divisors (635188281).

19690835719 is an equidigital number, since it uses as much as digits as its factorization.

19690835719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635188280.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 19690835719 in words is "nineteen billion, six hundred ninety million, eight hundred thirty-five thousand, seven hundred nineteen".