12520250320 has 20 divisors (see below), whose sum is σ = 29109582180. Its totient is φ = 5008100096.

The previous prime is 12520250251. The next prime is 12520250329. The reversal of 12520250320 is 2305202521.

It can be written as a sum of positive squares in 2 ways, for example, as 3381655104 + 9138595216 = 58152^2 + 95596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 12520250291 and 12520250300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520250329) 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, 78251485 + ... + 78251644.

It is an arithmetic number, because the mean of its divisors is an integer number (1455479109).

Almost surely, 2^12520250320 is an apocalyptic number.

12520250320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12520250320 is an abundant number, since it is smaller than the sum of its proper divisors (16589331860).

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

12520250320 is a wasteful number, since it uses less digits than its factorization.

12520250320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156503142 (or 156503136 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 12520250320 its reverse (2305202521), we get a palindrome (14825452841).

The spelling of 12520250320 in words is "twelve billion, five hundred twenty million, two hundred fifty thousand, three hundred twenty".