12944451220 has 12 divisors (see below), whose sum is σ = 27183347604. Its totient is φ = 5177780480.

The previous prime is 12944451217. The next prime is 12944451229. The reversal of 12944451220 is 2215444921.

It can be written as a sum of positive squares in 2 ways, for example, as 5030213776 + 7914237444 = 70924^2 + 88962^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12944451229) 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, 323611261 + ... + 323611300.

It is an arithmetic number, because the mean of its divisors is an integer number (2265278967).

Almost surely, 2^12944451220 is an apocalyptic number.

12944451220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12944451220 is an abundant number, since it is smaller than the sum of its proper divisors (14238896384).

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

12944451220 is a wasteful number, since it uses less digits than its factorization.

12944451220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647222570 (or 647222568 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 12944451220 in words is "twelve billion, nine hundred forty-four million, four hundred fifty-one thousand, two hundred twenty".