12442343220 has 36 divisors (see below), whose sum is σ = 37741774980. Its totient is φ = 3317958144.

The previous prime is 12442343209. The next prime is 12442343233. The reversal of 12442343220 is 2234324421.

12442343220 is a `hidden beast` number, since 12 + 4 + 423 + 4 + 3 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2852841744 + 9589501476 = 53412^2 + 97926^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34561885 + ... + 34562244.

Almost surely, 2^12442343220 is an apocalyptic number.

12442343220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442343220 is an abundant number, since it is smaller than the sum of its proper divisors (25299431760).

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

12442343220 is a wasteful number, since it uses less digits than its factorization.

12442343220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69124144 (or 69124139 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 12442343220 its reverse (2234324421), we get a palindrome (14676667641).

The spelling of 12442343220 in words is "twelve billion, four hundred forty-two million, three hundred forty-three thousand, two hundred twenty".