12443518 has 16 divisors (see below), whose sum is σ = 19728720. Its totient is φ = 5870016.

The previous prime is 12443491. The next prime is 12443521. The reversal of 12443518 is 81534421.

It is a super-2 number, since 2×12443518² = 309682280432648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 11530 + ... + 12562.

It is an arithmetic number, because the mean of its divisors is an integer number (1233045).

Almost surely, 2^12443518 is an apocalyptic number.

12443518 is a deficient number, since it is larger than the sum of its proper divisors (7285202).

12443518 is a wasteful number, since it uses less digits than its factorization.

12443518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371.

The product of its digits is 3840, while the sum is 28.

The square root of 12443518 is about 3527.5371011515. The cubic root of 12443518 is about 231.7293588993.

Adding to 12443518 its reverse (81534421), we get a palindrome (93977939).

The spelling of 12443518 in words is "twelve million, four hundred forty-three thousand, five hundred eighteen".