19828432128 has 72 divisors (see below), whose sum is σ = 53009651968. Its totient is φ = 6579781632.

The previous prime is 19828432123. The next prime is 19828432153. The reversal of 19828432128 is 82123482891.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828432123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113376 + ... + 229152.

Almost surely, 2^19828432128 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 19828432128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26504825984).

19828432128 is an abundant number, since it is smaller than the sum of its proper divisors (33181219840).

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

19828432128 is a wasteful number, since it uses less digits than its factorization.

19828432128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116019 (or 116005 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The spelling of 19828432128 in words is "nineteen billion, eight hundred twenty-eight million, four hundred thirty-two thousand, one hundred twenty-eight".