12534113220 has 96 divisors (see below), whose sum is σ = 35898508800. Its totient is φ = 3266179584.

The previous prime is 12534113197. The next prime is 12534113227. The reversal of 12534113220 is 2231143521.

It is not an unprimeable number, because it can be changed into a prime (12534113227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1996246 + ... + 2002514.

It is an arithmetic number, because the mean of its divisors is an integer number (373942800).

Almost surely, 2^12534113220 is an apocalyptic number.

12534113220 is a gapful number since it is divisible by the number (10) 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 12534113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17949254400).

12534113220 is an abundant number, since it is smaller than the sum of its proper divisors (23364395580).

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

12534113220 is a wasteful number, since it uses less digits than its factorization.

12534113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037 (or 7035 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12534113220 its reverse (2231143521), we get a palindrome (14765256741).

The spelling of 12534113220 in words is "twelve billion, five hundred thirty-four million, one hundred thirteen thousand, two hundred twenty".