8183221620 has 48 divisors (see below), whose sum is σ = 26186310528. Its totient is φ = 1870450560.

The previous prime is 8183221577. The next prime is 8183221637. The reversal of 8183221620 is 261223818.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9741511 + ... + 9742350.

It is an arithmetic number, because the mean of its divisors is an integer number (545548136).

Almost surely, 2^8183221620 is an apocalyptic number.

It is an amenable number.

8183221620 is an abundant number, since it is smaller than the sum of its proper divisors (18003088908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8183221620 is a wasteful number, since it uses less digits than its factorization.

8183221620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19483880 (or 19483878 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8183221620 is about 90461.1608371239. The cubic root of 8183221620 is about 2015.1533661157.

The spelling of 8183221620 in words is "eight billion, one hundred eighty-three million, two hundred twenty-one thousand, six hundred twenty".