12520138236 has 48 divisors (see below), whose sum is σ = 30786537600. Its totient is φ = 3949186752.

The previous prime is 12520138231. The next prime is 12520138261. The reversal of 12520138236 is 63283102521.

12520138236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12520138236² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12520138197 and 12520138206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520138231) 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 15 ways as a sum of consecutive naturals, for example, 170230 + ... + 232418.

It is an arithmetic number, because the mean of its divisors is an integer number (641386200).

Almost surely, 2^12520138236 is an apocalyptic number.

It is an amenable number.

12520138236 is an abundant number, since it is smaller than the sum of its proper divisors (18266399364).

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

12520138236 is a wasteful number, since it uses less digits than its factorization.

12520138236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63098 (or 63096 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 12520138236 in words is "twelve billion, five hundred twenty million, one hundred thirty-eight thousand, two hundred thirty-six".