8501866020 has 72 divisors (see below), whose sum is σ = 25818878904. Its totient is φ = 2264537088.

The previous prime is 8501866019. The next prime is 8501866069. The reversal of 8501866020 is 206681058.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1167998976 + 7333867044 = 34176^2 + 85638^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130932 + ... + 184788.

Almost surely, 2^8501866020 is an apocalyptic number.

It is an amenable number.

8501866020 is an abundant number, since it is smaller than the sum of its proper divisors (17317012884).

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

8501866020 is a wasteful number, since it uses less digits than its factorization.

8501866020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54749 (or 54744 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 8501866020 is about 92205.5639319016. The cubic root of 8501866020 is about 2040.9768821895.

The spelling of 8501866020 in words is "eight billion, five hundred one million, eight hundred sixty-six thousand, twenty".