12320423550 has 36 divisors (see below), whose sum is σ = 33100872480. Its totient is φ = 3285446160.

The previous prime is 12320423509. The next prime is 12320423569. The reversal of 12320423550 is 5532402321.

It is a happy number.

12320423550 is a `hidden beast` number, since 1 + 232 + 0 + 423 + 5 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13688910 + ... + 13689809.

It is an arithmetic number, because the mean of its divisors is an integer number (919468680).

Almost surely, 2^12320423550 is an apocalyptic number.

12320423550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12320423550 is an abundant number, since it is smaller than the sum of its proper divisors (20780448930).

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

12320423550 is a wasteful number, since it uses less digits than its factorization.

12320423550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27378737 (or 27378729 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 12320423550 its reverse (5532402321), we get a palindrome (17852825871).

The spelling of 12320423550 in words is "twelve billion, three hundred twenty million, four hundred twenty-three thousand, five hundred fifty".