209003189920 has 96 divisors (see below), whose sum is σ = 564479193600. Its totient is φ = 71636576256.

The previous prime is 209003189909. The next prime is 209003189933. The reversal of 209003189920 is 29981300902.

209003189920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3926041 + ... + 3978919.

It is an arithmetic number, because the mean of its divisors is an integer number (5879991600).

Almost surely, 2^209003189920 is an apocalyptic number.

209003189920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209003189920 is an abundant number, since it is smaller than the sum of its proper divisors (355476003680).

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

209003189920 is a wasteful number, since it uses less digits than its factorization.

209003189920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56430 (or 56422 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 209003189920 in words is "two hundred nine billion, three million, one hundred eighty-nine thousand, nine hundred twenty".