19194828664 has 64 divisors (see below), whose sum is σ = 40997975040. Its totient is φ = 8339717760.

The previous prime is 19194828659. The next prime is 19194828677. The reversal of 19194828664 is 46682849191.

It is a junction number, because it is equal to n+sod(n) for n = 19194828599 and 19194828608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4173214 + ... + 4177810.

It is an arithmetic number, because the mean of its divisors is an integer number (640593360).

Almost surely, 2^19194828664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19194828664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20498987520).

19194828664 is an abundant number, since it is smaller than the sum of its proper divisors (21803146376).

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

19194828664 is a wasteful number, since it uses less digits than its factorization.

19194828664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700 (or 6696 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 58.

The spelling of 19194828664 in words is "nineteen billion, one hundred ninety-four million, eight hundred twenty-eight thousand, six hundred sixty-four".