12523442427 has 8 divisors (see below), whose sum is σ = 18553248080. Its totient is φ = 8348961600.

The previous prime is 12523442419. The next prime is 12523442453. The reversal of 12523442427 is 72424432521.

It is not a de Polignac number, because 12523442427 - 2³ = 12523442419 is a prime.

It is a super-2 number, since 2×12523442427² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12523442391 and 12523442400.

It is not an unprimeable number, because it can be changed into a prime (12523482427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231915574 + ... + 231915627.

It is an arithmetic number, because the mean of its divisors is an integer number (2319156010).

Almost surely, 2^12523442427 is an apocalyptic number.

12523442427 is a deficient number, since it is larger than the sum of its proper divisors (6029805653).

12523442427 is an equidigital number, since it uses as much as digits as its factorization.

12523442427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463831210 (or 463831204 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

Adding to 12523442427 its reverse (72424432521), we get a palindrome (84947874948).

The spelling of 12523442427 in words is "twelve billion, five hundred twenty-three million, four hundred forty-two thousand, four hundred twenty-seven".