12205340423 has 4 divisors (see below), whose sum is σ = 12205799880. Its totient is φ = 12204880968.

The previous prime is 12205340401. The next prime is 12205340437. The reversal of 12205340423 is 32404350221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32404350221 = 1801 ⋅17992421.

It is a cyclic number.

It is not a de Polignac number, because 12205340423 - 2⁶ = 12205340359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12205340392 and 12205340401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205345423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187265 + ... + 243882.

It is an arithmetic number, because the mean of its divisors is an integer number (3051449970).

Almost surely, 2^12205340423 is an apocalyptic number.

12205340423 is a deficient number, since it is larger than the sum of its proper divisors (459457).

12205340423 is an equidigital number, since it uses as much as digits as its factorization.

12205340423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459456.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 12205340423 its reverse (32404350221), we get a palindrome (44609690644).

The spelling of 12205340423 in words is "twelve billion, two hundred five million, three hundred forty thousand, four hundred twenty-three".