12423240403 has 4 divisors (see below), whose sum is σ = 14197989040. Its totient is φ = 10648491768.

The previous prime is 12423240391. The next prime is 12423240491. The reversal of 12423240403 is 30404232421.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12423240403 is a prime.

It is a super-2 number, since 2×12423240403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12423240103) 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, 887374308 + ... + 887374321.

It is an arithmetic number, because the mean of its divisors is an integer number (3549497260).

Almost surely, 2^12423240403 is an apocalyptic number.

12423240403 is a deficient number, since it is larger than the sum of its proper divisors (1774748637).

12423240403 is an equidigital number, since it uses as much as digits as its factorization.

12423240403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774748636.

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

Adding to 12423240403 its reverse (30404232421), we get a palindrome (42827472824).

The spelling of 12423240403 in words is "twelve billion, four hundred twenty-three million, two hundred forty thousand, four hundred three".