6828818021 has 4 divisors (see below), whose sum is σ = 6843567552. Its totient is φ = 6814068492.

The previous prime is 6828817999. The next prime is 6828818027. The reversal of 6828818021 is 1208188286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6828818021 - 2¹⁰ = 6828816997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6828818027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7374071 + ... + 7374996.

It is an arithmetic number, because the mean of its divisors is an integer number (1710891888).

Almost surely, 2^6828818021 is an apocalyptic number.

It is an amenable number.

6828818021 is a deficient number, since it is larger than the sum of its proper divisors (14749531).

6828818021 is a wasteful number, since it uses less digits than its factorization.

6828818021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749530.

The product of its (nonzero) digits is 98304, while the sum is 44.

The square root of 6828818021 is about 82636.6626927782. The cubic root of 6828818021 is about 1897.2090158878.

The spelling of 6828818021 in words is "six billion, eight hundred twenty-eight million, eight hundred eighteen thousand, twenty-one".