12724037818 has 16 divisors (see below), whose sum is σ = 19637151624. Its totient is φ = 6178939200.

The previous prime is 12724037791. The next prime is 12724037827. The reversal of 12724037818 is 81873042721.

It can be written as a sum of positive squares in 4 ways, for example, as 12675832569 + 48205249 = 112587^2 + 6943^2 .

It is a super-2 number, since 2×12724037818² (a number of 21 digits) contains 22 as substring.

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, 113133 + ... + 195568.

Almost surely, 2^12724037818 is an apocalyptic number.

12724037818 is a deficient number, since it is larger than the sum of its proper divisors (6913113806).

12724037818 is a wasteful number, since it uses less digits than its factorization.

12724037818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309297.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 12724037818 in words is "twelve billion, seven hundred twenty-four million, thirty-seven thousand, eight hundred eighteen".