12340434431 has 32 divisors (see below), whose sum is σ = 14222208000. Its totient is φ = 10612747008.

The previous prime is 12340434397. The next prime is 12340434479. The reversal of 12340434431 is 13443404321.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12340434431 is a prime.

It is a super-2 number, since 2×12340434431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12340434394 and 12340434403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340434031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7914830 + ... + 7916388.

It is an arithmetic number, because the mean of its divisors is an integer number (444444000).

Almost surely, 2^12340434431 is an apocalyptic number.

12340434431 is a deficient number, since it is larger than the sum of its proper divisors (1881773569).

12340434431 is a wasteful number, since it uses less digits than its factorization.

12340434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 12340434431 its reverse (13443404321), we get a palindrome (25783838752).

The spelling of 12340434431 in words is "twelve billion, three hundred forty million, four hundred thirty-four thousand, four hundred thirty-one".