12400432100 has 72 divisors (see below), whose sum is σ = 30768530688. Its totient is φ = 4249440000.

The previous prime is 12400432039. The next prime is 12400432133. The reversal of 12400432100 is 123400421.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2097749 + ... + 2103651.

It is an arithmetic number, because the mean of its divisors is an integer number (427340704).

Almost surely, 2^12400432100 is an apocalyptic number.

12400432100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400432100 is an abundant number, since it is smaller than the sum of its proper divisors (18368098588).

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

12400432100 is a wasteful number, since it uses less digits than its factorization.

12400432100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925 (or 8918 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12400432100 its reverse (123400421), we get a palindrome (12523832521).

The spelling of 12400432100 in words is "twelve billion, four hundred million, four hundred thirty-two thousand, one hundred".