12443421440 has 36 divisors (see below), whose sum is σ = 29805885984. Its totient is φ = 4977368064.

The previous prime is 12443421437. The next prime is 12443421443. The reversal of 12443421440 is 4412434421.

It is an interprime number because it is at equal distance from previous prime (12443421437) and next prime (12443421443).

It is not an unprimeable number, because it can be changed into a prime (12443421443) 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, 4859432 + ... + 4861991.

Almost surely, 2^12443421440 is an apocalyptic number.

12443421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12443421440 is an abundant number, since it is smaller than the sum of its proper divisors (17362464544).

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

12443421440 is an frugal number, since it uses more digits than its factorization.

12443421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9721444 (or 9721430 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 12443421440 its reverse (4412434421), we get a palindrome (16855855861).

The spelling of 12443421440 in words is "twelve billion, four hundred forty-three million, four hundred twenty-one thousand, four hundred forty".