19352128668 has 12 divisors (see below), whose sum is σ = 45154966920. Its totient is φ = 6450709552.

The previous prime is 19352128667. The next prime is 19352128681. The reversal of 19352128668 is 86682125391.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19352128668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19352128667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806338683 + ... + 806338706.

It is an arithmetic number, because the mean of its divisors is an integer number (3762913910).

Almost surely, 2^19352128668 is an apocalyptic number.

It is an amenable number.

19352128668 is an abundant number, since it is smaller than the sum of its proper divisors (25802838252).

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

19352128668 is a wasteful number, since it uses less digits than its factorization.

19352128668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612677396 (or 1612677394 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The spelling of 19352128668 in words is "nineteen billion, three hundred fifty-two million, one hundred twenty-eight thousand, six hundred sixty-eight".