8518843213 has 4 divisors (see below), whose sum is σ = 8519420700. Its totient is φ = 8518265728.

The previous prime is 8518843189. The next prime is 8518843217. The reversal of 8518843213 is 3123488158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5032767364 + 3486075849 = 70942^2 + 59043^2 .

It is a cyclic number.

It is not a de Polignac number, because 8518843213 - 2⁵ = 8518843181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8518843213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8518843217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266020 + ... + 296317.

It is an arithmetic number, because the mean of its divisors is an integer number (2129855175).

Almost surely, 2^8518843213 is an apocalyptic number.

It is an amenable number.

8518843213 is a deficient number, since it is larger than the sum of its proper divisors (577487).

8518843213 is a wasteful number, since it uses less digits than its factorization.

8518843213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577486.

The product of its digits is 184320, while the sum is 43.

The square root of 8518843213 is about 92297.5796703251. The cubic root of 8518843213 is about 2042.3345065009.

The spelling of 8518843213 in words is "eight billion, five hundred eighteen million, eight hundred forty-three thousand, two hundred thirteen".