19835189220 has 240 divisors, whose sum is σ = 70686842688. Its totient is φ = 4121268480.

The previous prime is 19835189191. The next prime is 19835189237. The reversal of 19835189220 is 2298153891.

It is a self number, because there is not a number n which added to its sum of digits gives 19835189220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1578402 + ... + 1590918.

Almost surely, 2^19835189220 is an apocalyptic number.

19835189220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19835189220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35343421344).

19835189220 is an abundant number, since it is smaller than the sum of its proper divisors (50851653468).

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

19835189220 is a wasteful number, since it uses less digits than its factorization.

19835189220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12568 (or 12545 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 19835189220 in words is "nineteen billion, eight hundred thirty-five million, one hundred eighty-nine thousand, two hundred twenty".