12404213442 has 36 divisors (see below), whose sum is σ = 27834538290. Its totient is φ = 3992155776.

The previous prime is 12404213417. The next prime is 12404213449. The reversal of 12404213442 is 24431240421.

12404213442 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 4 + 213 + 442 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 12319002081 + 85211361 = 110991^2 + 9231^2 .

It is a super-2 number, since 2×12404213442² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12404213449) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 394567 + ... + 424842.

Almost surely, 2^12404213442 is an apocalyptic number.

12404213442 is an abundant number, since it is smaller than the sum of its proper divisors (15430324848).

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

12404213442 is a wasteful number, since it uses less digits than its factorization.

12404213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819475 (or 819443 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 12404213442 its reverse (24431240421), we get a palindrome (36835453863).

The spelling of 12404213442 in words is "twelve billion, four hundred four million, two hundred thirteen thousand, four hundred forty-two".