19345250868 has 12 divisors (see below), whose sum is σ = 45138918720. Its totient is φ = 6448416952.

The previous prime is 19345250863. The next prime is 19345250971. The reversal of 19345250868 is 86805254391.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×19345250868² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19345250868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19345250863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806052108 + ... + 806052131.

It is an arithmetic number, because the mean of its divisors is an integer number (3761576560).

Almost surely, 2^19345250868 is an apocalyptic number.

It is an amenable number.

19345250868 is an abundant number, since it is smaller than the sum of its proper divisors (25793667852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19345250868 is a wasteful number, since it uses less digits than its factorization.

19345250868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612104246 (or 1612104244 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 19345250868 in words is "nineteen billion, three hundred forty-five million, two hundred fifty thousand, eight hundred sixty-eight".