8521018047 has 16 divisors (see below), whose sum is σ = 12644551680. Its totient is φ = 5671309176.

The previous prime is 8521018021. The next prime is 8521018063. The reversal of 8521018047 is 7408101258.

It is not a de Polignac number, because 8521018047 - 2⁶ = 8521017983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521018547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243573 + ... + 276350.

It is an arithmetic number, because the mean of its divisors is an integer number (790284480).

Almost surely, 2^8521018047 is an apocalyptic number.

8521018047 is a deficient number, since it is larger than the sum of its proper divisors (4123533633).

8521018047 is a wasteful number, since it uses less digits than its factorization.

8521018047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520539 (or 520533 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 8521018047 is about 92309.3605600212. The cubic root of 8521018047 is about 2042.5082922478.

The spelling of 8521018047 in words is "eight billion, five hundred twenty-one million, eighteen thousand, forty-seven".