12320042240 has 144 divisors (see below), whose sum is σ = 32362243200. Its totient is φ = 4456488960.

The previous prime is 12320042233. The next prime is 12320042243. The reversal of 12320042240 is 4224002321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320042243) 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, 2799722 + ... + 2804118.

It is an arithmetic number, because the mean of its divisors is an integer number (224737800).

Almost surely, 2^12320042240 is an apocalyptic number.

12320042240 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 12320042240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16181121600).

12320042240 is an abundant number, since it is smaller than the sum of its proper divisors (20042200960).

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

12320042240 is a wasteful number, since it uses less digits than its factorization.

12320042240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4614 counting only the distinct ones).

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

Adding to 12320042240 its reverse (4224002321), we get a palindrome (16544044561).

The spelling of 12320042240 in words is "twelve billion, three hundred twenty million, forty-two thousand, two hundred forty".