12423018689 has 4 divisors (see below), whose sum is σ = 12424535124. Its totient is φ = 12421502256.

The previous prime is 12423018683. The next prime is 12423018733. The reversal of 12423018689 is 98681032421.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6652033600 + 5770985089 = 81560^2 + 75967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12423018689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12423018683) 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, 745862 + ... + 762335.

It is an arithmetic number, because the mean of its divisors is an integer number (3106133781).

Almost surely, 2^12423018689 is an apocalyptic number.

It is an amenable number.

12423018689 is a deficient number, since it is larger than the sum of its proper divisors (1516435).

12423018689 is an equidigital number, since it uses as much as digits as its factorization.

12423018689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516434.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 12423018689 in words is "twelve billion, four hundred twenty-three million, eighteen thousand, six hundred eighty-nine".