19835235728 has 120 divisors (see below), whose sum is σ = 48371695680. Its totient is φ = 7712812800.

The previous prime is 19835235709. The next prime is 19835235733. The reversal of 19835235728 is 82753253891.

It is a self number, because there is not a number n which added to its sum of digits gives 19835235728.

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, 8929658 + ... + 8931878.

It is an arithmetic number, because the mean of its divisors is an integer number (403097464).

Almost surely, 2^19835235728 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 19835235728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24185847840).

19835235728 is an abundant number, since it is smaller than the sum of its proper divisors (28536459952).

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

19835235728 is a wasteful number, since it uses less digits than its factorization.

19835235728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2900 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 53.

The spelling of 19835235728 in words is "nineteen billion, eight hundred thirty-five million, two hundred thirty-five thousand, seven hundred twenty-eight".