12420403224 has 64 divisors (see below), whose sum is σ = 31999242240. Its totient is φ = 4014915840.

The previous prime is 12420403207. The next prime is 12420403273. The reversal of 12420403224 is 42230402421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12420403194 and 12420403203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126537 + ... + 202119.

It is an arithmetic number, because the mean of its divisors is an integer number (499988160).

Almost surely, 2^12420403224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12420403224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15999621120).

12420403224 is an abundant number, since it is smaller than the sum of its proper divisors (19578839016).

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

12420403224 is a wasteful number, since it uses less digits than its factorization.

12420403224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75800 (or 75796 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 12420403224 its reverse (42230402421), we get a palindrome (54650805645).

The spelling of 12420403224 in words is "twelve billion, four hundred twenty million, four hundred three thousand, two hundred twenty-four".