12587431936 has 48 divisors (see below), whose sum is σ = 25595551800. Its totient is φ = 6186983424.

The previous prime is 12587431867. The next prime is 12587431937. The reversal of 12587431936 is 63913478521.

It is a self number, because there is not a number n which added to its sum of digits gives 12587431936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12587431937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68746 + ... + 172918.

Almost surely, 2^12587431936 is an apocalyptic number.

12587431936 is a gapful number since it is divisible by the number (16) 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 12587431936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12797775900).

12587431936 is an abundant number, since it is smaller than the sum of its proper divisors (13008119864).

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

12587431936 is an equidigital number, since it uses as much as digits as its factorization.

12587431936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104254 (or 104234 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The spelling of 12587431936 in words is "twelve billion, five hundred eighty-seven million, four hundred thirty-one thousand, nine hundred thirty-six".