12420420324 has 48 divisors (see below), whose sum is σ = 32286515520. Its totient is φ = 3689884800.

The previous prime is 12420420323. The next prime is 12420420347. The reversal of 12420420324 is 42302402421.

It is a junction number, because it is equal to n+sod(n) for n = 12420420294 and 12420420303.

It is not an unprimeable number, because it can be changed into a prime (12420420323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368202 + ... + 1377249.

It is an arithmetic number, because the mean of its divisors is an integer number (672635740).

Almost surely, 2^12420420324 is an apocalyptic number.

It is an amenable number.

12420420324 is an abundant number, since it is smaller than the sum of its proper divisors (19866095196).

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

12420420324 is a wasteful number, since it uses less digits than its factorization.

12420420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745500 (or 2745498 counting only the distinct ones).

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

Adding to 12420420324 its reverse (42302402421), we get a palindrome (54722822745).

The spelling of 12420420324 in words is "twelve billion, four hundred twenty million, four hundred twenty thousand, three hundred twenty-four".