12400434431 has 8 divisors (see below), whose sum is σ = 15460281984. Its totient is φ = 9662676120.

The previous prime is 12400434419. The next prime is 12400434439. The reversal of 12400434431 is 13443400421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12400434431 - 2¹⁴ = 12400418047 is a prime.

It is a super-2 number, since 2×12400434431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12400434431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400434439) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 80522225 + ... + 80522378.

It is an arithmetic number, because the mean of its divisors is an integer number (1932535248).

Almost surely, 2^12400434431 is an apocalyptic number.

12400434431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12400434431 is a deficient number, since it is larger than the sum of its proper divisors (3059847553).

12400434431 is a wasteful number, since it uses less digits than its factorization.

12400434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161044621.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 12400434431 its reverse (13443400421), we get a palindrome (25843834852).

The spelling of 12400434431 in words is "twelve billion, four hundred million, four hundred thirty-four thousand, four hundred thirty-one".