220818667682 has 18 divisors (see below), whose sum is σ = 332910163089. Its totient is φ = 109851437400.

The previous prime is 220818667621. The next prime is 220818667703. The reversal of 220818667682 is 286766818022.

It is a happy number.

220818667682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 166244568361 + 54574099321 = 407731^2 + 233611^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332279.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 152183057 + ... + 152184507.

Almost surely, 2^220818667682 is an apocalyptic number.

220818667682 is a deficient number, since it is larger than the sum of its proper divisors (112091495407).

220818667682 is an frugal number, since it uses more digits than its factorization.

220818667682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 220818667682 in words is "two hundred twenty billion, eight hundred eighteen million, six hundred sixty-seven thousand, six hundred eighty-two".