8120673820 has 96 divisors (see below), whose sum is σ = 20175482880. Its totient is φ = 2686763520.

The previous prime is 8120673817. The next prime is 8120673859. The reversal of 8120673820 is 283760218.

It is a self number, because there is not a number n which added to its sum of digits gives 8120673820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1642392 + ... + 1647328.

It is an arithmetic number, because the mean of its divisors is an integer number (210161280).

Almost surely, 2^8120673820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8120673820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10087741440).

8120673820 is an abundant number, since it is smaller than the sum of its proper divisors (12054809060).

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

8120673820 is a wasteful number, since it uses less digits than its factorization.

8120673820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363 (or 5361 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 8120673820 is about 90114.7813624380. The cubic root of 8120673820 is about 2010.0060080842.

The spelling of 8120673820 in words is "eight billion, one hundred twenty million, six hundred seventy-three thousand, eight hundred twenty".