12400432443 has 12 divisors (see below), whose sum is σ = 20470555248. Its totient is φ = 7085961360.

The previous prime is 12400432391. The next prime is 12400432463. The reversal of 12400432443 is 34423400421.

It is a happy number.

12400432443 is a `hidden beast` number, since 12 + 400 + 4 + 3 + 244 + 3 = 666.

It is not a de Polignac number, because 12400432443 - 2²² = 12396238139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12400432463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98416068 + ... + 98416193.

It is an arithmetic number, because the mean of its divisors is an integer number (1705879604).

Almost surely, 2^12400432443 is an apocalyptic number.

12400432443 is a deficient number, since it is larger than the sum of its proper divisors (8070122805).

12400432443 is a wasteful number, since it uses less digits than its factorization.

12400432443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196832274 (or 196832271 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 12400432443 its reverse (34423400421), we get a palindrome (46823832864).

The spelling of 12400432443 in words is "twelve billion, four hundred million, four hundred thirty-two thousand, four hundred forty-three".