12004043240 has 128 divisors (see below), whose sum is σ = 31688755200. Its totient is φ = 4007512320.

The previous prime is 12004043239. The next prime is 12004043243. The reversal of 12004043240 is 4234040021.

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 (12004043243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1764245 + ... + 1771035.

It is an arithmetic number, because the mean of its divisors is an integer number (247568400).

Almost surely, 2^12004043240 is an apocalyptic number.

12004043240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12004043240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15844377600).

12004043240 is an abundant number, since it is smaller than the sum of its proper divisors (19684711960).

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

12004043240 is a wasteful number, since it uses less digits than its factorization.

12004043240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6975 (or 6971 counting only the distinct ones).

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

Adding to 12004043240 its reverse (4234040021), we get a palindrome (16238083261).

The spelling of 12004043240 in words is "twelve billion, four million, forty-three thousand, two hundred forty".