12724267018 has 4 divisors (see below), whose sum is σ = 19086400530. Its totient is φ = 6362133508.

The previous prime is 12724266991. The next prime is 12724267021. The reversal of 12724267018 is 81076242721.

12724267018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81076242721 = 1429 ⋅56736349.

It can be written as a sum of positive squares in only one way, i.e., 9827351689 + 2896915329 = 99133^2 + 53823^2 .

It is a super-2 number, since 2×12724267018² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3181066753 + ... + 3181066756.

Almost surely, 2^12724267018 is an apocalyptic number.

12724267018 is a deficient number, since it is larger than the sum of its proper divisors (6362133512).

12724267018 is an equidigital number, since it uses as much as digits as its factorization.

12724267018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6362133511.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 12724267018 in words is "twelve billion, seven hundred twenty-four million, two hundred sixty-seven thousand, eighteen".