12189000208 has 320 divisors, whose sum is σ = 31992952320. Its totient is φ = 4361011200.

The previous prime is 12189000199. The next prime is 12189000227. The reversal of 12189000208 is 80200098121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12189000208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77636866 + ... + 77637022.

It is an arithmetic number, because the mean of its divisors is an integer number (99977976).

Almost surely, 2^12189000208 is an apocalyptic number.

12189000208 is the 63742-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189000208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15996476160).

12189000208 is an abundant number, since it is smaller than the sum of its proper divisors (19803952112).

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

12189000208 is a wasteful number, since it uses less digits than its factorization.

12189000208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

Adding to 12189000208 its reverse (80200098121), we get a palindrome (92389098329).

The spelling of 12189000208 in words is "twelve billion, one hundred eighty-nine million, two hundred eight", and thus it is an aban number.