12187089108 has 108 divisors (see below), whose sum is σ = 32018907648. Its totient is φ = 3908318400.

The previous prime is 12187089107. The next prime is 12187089121. The reversal of 12187089108 is 80198078121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187089107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11595183 + ... + 11596233.

Almost surely, 2^12187089108 is an apocalyptic number.

12187089108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12187089108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16009453824).

12187089108 is an abundant number, since it is smaller than the sum of its proper divisors (19831818540).

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

12187089108 is a wasteful number, since it uses less digits than its factorization.

12187089108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The spelling of 12187089108 in words is "twelve billion, one hundred eighty-seven million, eighty-nine thousand, one hundred eight".