12444520420 has 12 divisors (see below), whose sum is σ = 26133492924. Its totient is φ = 4977808160.

The previous prime is 12444520411. The next prime is 12444520441. The reversal of 12444520420 is 2402544421.

12444520420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7882598656 + 4561921764 = 88784^2 + 67542^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311112991 + ... + 311113030.

It is an arithmetic number, because the mean of its divisors is an integer number (2177791077).

Almost surely, 2^12444520420 is an apocalyptic number.

12444520420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444520420 is an abundant number, since it is smaller than the sum of its proper divisors (13688972504).

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

12444520420 is a wasteful number, since it uses less digits than its factorization.

12444520420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622226030 (or 622226028 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The spelling of 12444520420 in words is "twelve billion, four hundred forty-four million, five hundred twenty thousand, four hundred twenty".