12144323420 has 48 divisors (see below), whose sum is σ = 26159898240. Its totient is φ = 4733528064.

The previous prime is 12144323393. The next prime is 12144323431. The reversal of 12144323420 is 2432344121.

It is a self number, because there is not a number n which added to its sum of digits gives 12144323420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187052 + ... + 243468.

It is an arithmetic number, because the mean of its divisors is an integer number (544997880).

Almost surely, 2^12144323420 is an apocalyptic number.

12144323420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12144323420 is an abundant number, since it is smaller than the sum of its proper divisors (14015574820).

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

12144323420 is a wasteful number, since it uses less digits than its factorization.

12144323420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56702 (or 56700 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 12144323420 its reverse (2432344121), we get a palindrome (14576667541).

The spelling of 12144323420 in words is "twelve billion, one hundred forty-four million, three hundred twenty-three thousand, four hundred twenty".