12423431234 has 4 divisors (see below), whose sum is σ = 18635146854. Its totient is φ = 6211715616.

The previous prime is 12423431221. The next prime is 12423431261. The reversal of 12423431234 is 43213432421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10816624009 + 1606807225 = 104003^2 + 40085^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12423431197 and 12423431206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105857807 + ... + 3105857810.

Almost surely, 2^12423431234 is an apocalyptic number.

12423431234 is a deficient number, since it is larger than the sum of its proper divisors (6211715620).

12423431234 is an equidigital number, since it uses as much as digits as its factorization.

12423431234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211715619.

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

Adding to 12423431234 its reverse (43213432421), we get a palindrome (55636863655).

The spelling of 12423431234 in words is "twelve billion, four hundred twenty-three million, four hundred thirty-one thousand, two hundred thirty-four".