12324431500 has 48 divisors (see below), whose sum is σ = 26963838720. Its totient is φ = 4921113600.

The previous prime is 12324431447. The next prime is 12324431519. The reversal of 12324431500 is 513442321.

It is a super-2 number, since 2×12324431500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 267141 + ... + 309859.

It is an arithmetic number, because the mean of its divisors is an integer number (561746640).

Almost surely, 2^12324431500 is an apocalyptic number.

12324431500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12324431500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13481919360).

12324431500 is an abundant number, since it is smaller than the sum of its proper divisors (14639407220).

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

12324431500 is a wasteful number, since it uses less digits than its factorization.

12324431500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43315 (or 43303 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12324431500 its reverse (513442321), we get a palindrome (12837873821).

The spelling of 12324431500 in words is "twelve billion, three hundred twenty-four million, four hundred thirty-one thousand, five hundred".