12323203240 has 32 divisors (see below), whose sum is σ = 27749035080. Its totient is φ = 4925400832.

The previous prime is 12323203237. The next prime is 12323203273. The reversal of 12323203240 is 4230232321.

It can be written as a sum of positive squares in 4 ways, for example, as 11718928516 + 604274724 = 108254^2 + 24582^2 .

It is a super-2 number, since 2×12323203240² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69547 + ... + 171706.

Almost surely, 2^12323203240 is an apocalyptic number.

12323203240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12323203240 is an abundant number, since it is smaller than the sum of its proper divisors (15425831840).

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

12323203240 is a wasteful number, since it uses less digits than its factorization.

12323203240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242541 (or 242537 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 12323203240 its reverse (4230232321), we get a palindrome (16553435561).

The spelling of 12323203240 in words is "twelve billion, three hundred twenty-three million, two hundred three thousand, two hundred forty".