12243423138 has 16 divisors (see below), whose sum is σ = 24488083776. Its totient is φ = 4080934800.

The previous prime is 12243423133. The next prime is 12243423149. The reversal of 12243423138 is 83132434221.

It is a super-2 number, since 2×12243423138² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12243423099 and 12243423108.

It is not an unprimeable number, because it can be changed into a prime (12243423131) 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 7 ways as a sum of consecutive naturals, for example, 121995 + ... + 198417.

It is an arithmetic number, because the mean of its divisors is an integer number (1530505236).

Almost surely, 2^12243423138 is an apocalyptic number.

12243423138 is an abundant number, since it is smaller than the sum of its proper divisors (12244660638).

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

12243423138 is a wasteful number, since it uses less digits than its factorization.

12243423138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103129.

The product of its digits is 27648, while the sum is 33.

Adding to 12243423138 its reverse (83132434221), we get a palindrome (95375857359).

The spelling of 12243423138 in words is "twelve billion, two hundred forty-three million, four hundred twenty-three thousand, one hundred thirty-eight".