12520370400 has 144 divisors (see below), whose sum is σ = 41362602624. Its totient is φ = 3288890880.

The previous prime is 12520370389. The next prime is 12520370417. The reversal of 12520370400 is 407302521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121869 + ... + 199731.

It is an arithmetic number, because the mean of its divisors is an integer number (287240296).

Almost surely, 2^12520370400 is an apocalyptic number.

12520370400 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 12520370400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20681301312).

12520370400 is an abundant number, since it is smaller than the sum of its proper divisors (28842232224).

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

12520370400 is a wasteful number, since it uses less digits than its factorization.

12520370400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77953 (or 77940 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

Adding to 12520370400 its reverse (407302521), we get a palindrome (12927672921).

The spelling of 12520370400 in words is "twelve billion, five hundred twenty million, three hundred seventy thousand, four hundred".