12340423144 has 32 divisors (see below), whose sum is σ = 26447368320. Its totient is φ = 5288031936.

The previous prime is 12340423141. The next prime is 12340423201. The reversal of 12340423144 is 44132404321.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (12340423141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704962 + ... + 722254.

It is an arithmetic number, because the mean of its divisors is an integer number (826480260).

Almost surely, 2^12340423144 is an apocalyptic number.

12340423144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12340423144 is an abundant number, since it is smaller than the sum of its proper divisors (14106945176).

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

12340423144 is a wasteful number, since it uses less digits than its factorization.

12340423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30049 (or 30045 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12340423144 its reverse (44132404321), we get a palindrome (56472827465).

The spelling of 12340423144 in words is "twelve billion, three hundred forty million, four hundred twenty-three thousand, one hundred forty-four".