12530385138 has 16 divisors (see below), whose sum is σ = 25072667136. Its totient is φ = 4174812240.

The previous prime is 12530385113. The next prime is 12530385139. The reversal of 12530385138 is 83158303521.

It is a super-2 number, since 2×12530385138² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12530385096 and 12530385105.

It is not an unprimeable number, because it can be changed into a prime (12530385139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481981 + ... + 507312.

It is an arithmetic number, because the mean of its divisors is an integer number (1567041696).

Almost surely, 2^12530385138 is an apocalyptic number.

12530385138 is an abundant number, since it is smaller than the sum of its proper divisors (12542281998).

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

12530385138 is a wasteful number, since it uses less digits than its factorization.

12530385138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991409.

The product of its (nonzero) digits is 86400, while the sum is 39.

Adding to 12530385138 its reverse (83158303521), we get a palindrome (95688688659).

The spelling of 12530385138 in words is "twelve billion, five hundred thirty million, three hundred eighty-five thousand, one hundred thirty-eight".