12043402400 has 72 divisors (see below), whose sum is σ = 29419679520. Its totient is φ = 4814293760.

The previous prime is 12043402387. The next prime is 12043402403. The reversal of 12043402400 is 420434021.

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

It is not an unprimeable number, because it can be changed into a prime (12043402403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1579397 + ... + 1587003.

It is an arithmetic number, because the mean of its divisors is an integer number (408606660).

Almost surely, 2^12043402400 is an apocalyptic number.

12043402400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12043402400 is an abundant number, since it is smaller than the sum of its proper divisors (17376277120).

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

12043402400 is a wasteful number, since it uses less digits than its factorization.

12043402400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9606 (or 9593 counting only the distinct ones).

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

Adding to 12043402400 its reverse (420434021), we get a palindrome (12463836421).

The spelling of 12043402400 in words is "twelve billion, forty-three million, four hundred two thousand, four hundred".