12043420040 has 32 divisors (see below), whose sum is σ = 27128672280. Its totient is φ = 4811860992.

The previous prime is 12043420027. The next prime is 12043420049. The reversal of 12043420040 is 4002434021.

It can be written as a sum of positive squares in 4 ways, for example, as 11921582596 + 121837444 = 109186^2 + 11038^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12043419994 and 12043420021.

It is not an unprimeable number, because it can be changed into a prime (12043420049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136577 + ... + 206736.

Almost surely, 2^12043420040 is an apocalyptic number.

12043420040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12043420040 is an abundant number, since it is smaller than the sum of its proper divisors (15085252240).

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

12043420040 is a wasteful number, since it uses less digits than its factorization.

12043420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344201 (or 344197 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12043420040 its reverse (4002434021), we get a palindrome (16045854061).

The spelling of 12043420040 in words is "twelve billion, forty-three million, four hundred twenty thousand, forty".