12423430042 has 4 divisors (see below), whose sum is σ = 18635145066. Its totient is φ = 6211715020.

The previous prime is 12423430039. The next prime is 12423430069. The reversal of 12423430042 is 24003432421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24003432421 = 17 ⋅1411966613.

It can be written as a sum of positive squares in only one way, i.e., 12319002081 + 104427961 = 110991^2 + 10219^2 .

It is a super-2 number, since 2×12423430042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12423429989 and 12423430016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105857509 + ... + 3105857512.

Almost surely, 2^12423430042 is an apocalyptic number.

12423430042 is a deficient number, since it is larger than the sum of its proper divisors (6211715024).

12423430042 is an equidigital number, since it uses as much as digits as its factorization.

12423430042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211715023.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 12423430042 its reverse (24003432421), we get a palindrome (36426862463).

The spelling of 12423430042 in words is "twelve billion, four hundred twenty-three million, four hundred thirty thousand, forty-two".