19839875364 has 72 divisors (see below), whose sum is σ = 53335140768. Its totient is φ = 6196811520.

The previous prime is 19839875323. The next prime is 19839875387. The reversal of 19839875364 is 46357893891.

19839875364 is a `hidden beast` number, since 1 + 9 + 8 + 3 + 98 + 7 + 536 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67519 + ... + 210329.

It is an arithmetic number, because the mean of its divisors is an integer number (740765844).

Almost surely, 2^19839875364 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 19839875364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26667570384).

19839875364 is an abundant number, since it is smaller than the sum of its proper divisors (33495265404).

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

19839875364 is a wasteful number, since it uses less digits than its factorization.

19839875364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143065 (or 143060 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 19839875364 in words is "nineteen billion, eight hundred thirty-nine million, eight hundred seventy-five thousand, three hundred sixty-four".