12520720224 has 36 divisors (see below), whose sum is σ = 35605798956. Its totient is φ = 4173573312.

The previous prime is 12520720181. The next prime is 12520720253. The reversal of 12520720224 is 42202702521.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12520720224² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21737074 + ... + 21737649.

It is an arithmetic number, because the mean of its divisors is an integer number (989049971).

Almost surely, 2^12520720224 is an apocalyptic number.

It is an amenable number.

12520720224 is an abundant number, since it is smaller than the sum of its proper divisors (23085078732).

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

12520720224 is a wasteful number, since it uses less digits than its factorization.

12520720224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43474739 (or 43474728 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The spelling of 12520720224 in words is "twelve billion, five hundred twenty million, seven hundred twenty thousand, two hundred twenty-four".