12445340520 has 32 divisors (see below), whose sum is σ = 37336021920. Its totient is φ = 3318757440.

The previous prime is 12445340519. The next prime is 12445340527. The reversal of 12445340520 is 2504354421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12445340527) 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, 51855466 + ... + 51855705.

It is an arithmetic number, because the mean of its divisors is an integer number (1166750685).

Almost surely, 2^12445340520 is an apocalyptic number.

12445340520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12445340520 is an abundant number, since it is smaller than the sum of its proper divisors (24890681400).

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

12445340520 is a wasteful number, since it uses less digits than its factorization.

12445340520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103711185 (or 103711181 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 12445340520 its reverse (2504354421), we get a palindrome (14949694941).

The spelling of 12445340520 in words is "twelve billion, four hundred forty-five million, three hundred forty thousand, five hundred twenty".