12523442422 has 16 divisors (see below), whose sum is σ = 18860652720. Its totient is φ = 6236600832.

The previous prime is 12523442419. The next prime is 12523442453. The reversal of 12523442422 is 22424432521.

It is a happy number.

It is a super-2 number, since 2×12523442422² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613354 + ... + 633442.

It is an arithmetic number, because the mean of its divisors is an integer number (1178790795).

Almost surely, 2^12523442422 is an apocalyptic number.

12523442422 is a deficient number, since it is larger than the sum of its proper divisors (6337210298).

12523442422 is a wasteful number, since it uses less digits than its factorization.

12523442422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327.

The product of its digits is 30720, while the sum is 31.

Adding to 12523442422 its reverse (22424432521), we get a palindrome (34947874943).

Subtracting 12523442422 from its reverse (22424432521), we obtain a palindrome (9900990099).

The spelling of 12523442422 in words is "twelve billion, five hundred twenty-three million, four hundred forty-two thousand, four hundred twenty-two".