12081821589 has 24 divisors (see below), whose sum is σ = 17748081312. Its totient is φ = 7917829920.

The previous prime is 12081821569. The next prime is 12081821641. The reversal of 12081821589 is 98512818021.

12081821589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12081821589 - 2¹² = 12081817493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081821539) 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 23 ways as a sum of consecutive naturals, for example, 1094154 + ... + 1105140.

It is an arithmetic number, because the mean of its divisors is an integer number (739503388).

Almost surely, 2^12081821589 is an apocalyptic number.

It is an amenable number.

12081821589 is a deficient number, since it is larger than the sum of its proper divisors (5666259723).

12081821589 is a wasteful number, since it uses less digits than its factorization.

12081821589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13057 (or 13054 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 12081821589 in words is "twelve billion, eighty-one million, eight hundred twenty-one thousand, five hundred eighty-nine".