8020009812 has 12 divisors (see below), whose sum is σ = 18713356256. Its totient is φ = 2673336600.

The previous prime is 8020009799. The next prime is 8020009849. The reversal of 8020009812 is 2189000208.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 8020009812.

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 3 ways as a sum of consecutive naturals, for example, 334167064 + ... + 334167087.

Almost surely, 2^8020009812 is an apocalyptic number.

It is an amenable number.

8020009812 is an abundant number, since it is smaller than the sum of its proper divisors (10693346444).

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

8020009812 is a wasteful number, since it uses less digits than its factorization.

8020009812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668334158 (or 668334156 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8020009812 is about 89554.5074912480. The cubic root of 8020009812 is about 2001.6660960100. Note that the first 3 decimals are identical.

The spelling of 8020009812 in words is "eight billion, twenty million, nine thousand, eight hundred twelve".