189838804020 has 48 divisors (see below), whose sum is σ = 531567697920. Its totient is φ = 50621867136.

The previous prime is 189838803991. The next prime is 189838804021. The reversal of 189838804020 is 20408838981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189838804021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2947926 + ... + 3011634.

It is an arithmetic number, because the mean of its divisors is an integer number (11074327040).

Almost surely, 2^189838804020 is an apocalyptic number.

189838804020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189838804020 is an abundant number, since it is smaller than the sum of its proper divisors (341728893900).

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

189838804020 is a wasteful number, since it uses less digits than its factorization.

189838804020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113384 (or 113382 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 189838804020 in words is "one hundred eighty-nine billion, eight hundred thirty-eight million, eight hundred four thousand, twenty".