6818205823 has 64 divisors (see below), whose sum is σ = 8494295040. Its totient is φ = 5389286400.

The previous prime is 6818205817. The next prime is 6818205833. The reversal of 6818205823 is 3285028186.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6818205823 is a prime.

It is a super-2 number, since 2×6818205823² = 92975861289582214658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6818205823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818205833) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30036036 + ... + 30036262.

It is an arithmetic number, because the mean of its divisors is an integer number (132723360).

Almost surely, 2^6818205823 is an apocalyptic number.

6818205823 is a deficient number, since it is larger than the sum of its proper divisors (1676089217).

6818205823 is a wasteful number, since it uses less digits than its factorization.

6818205823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448.

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

The square root of 6818205823 is about 82572.4277407416. The cubic root of 6818205823 is about 1896.2257321985.

The spelling of 6818205823 in words is "six billion, eight hundred eighteen million, two hundred five thousand, eight hundred twenty-three".