189838182020 has 24 divisors (see below), whose sum is σ = 402770085144. Its totient is φ = 75152434176.

The previous prime is 189838181947. The next prime is 189838182029. The reversal of 189838182020 is 20281838981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 627101764 + 189211080256 = 25042^2 + 434984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 189838182020.

It is not an unprimeable number, because it can be changed into a prime (189838182029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48925427 + ... + 48929306.

It is an arithmetic number, because the mean of its divisors is an integer number (16782086881).

Almost surely, 2^189838182020 is an apocalyptic number.

189838182020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189838182020 is an abundant number, since it is smaller than the sum of its proper divisors (212931903124).

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

189838182020 is a wasteful number, since it uses less digits than its factorization.

189838182020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97854839 (or 97854837 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 50.

The spelling of 189838182020 in words is "one hundred eighty-nine billion, eight hundred thirty-eight million, one hundred eighty-two thousand, twenty".