8205547218 has 64 divisors (see below), whose sum is σ = 18613808640. Its totient is φ = 2389622400.

The previous prime is 8205547193. The next prime is 8205547237. The reversal of 8205547218 is 8127455028.

It is a self number, because there is not a number n which added to its sum of digits gives 8205547218.

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, 158673 + ... + 203931.

It is an arithmetic number, because the mean of its divisors is an integer number (290840760).

Almost surely, 2^8205547218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8205547218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9306904320).

8205547218 is an abundant number, since it is smaller than the sum of its proper divisors (10408261422).

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

8205547218 is a wasteful number, since it uses less digits than its factorization.

8205547218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45383.

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 8205547218 is about 90584.4755904675. The cubic root of 8205547218 is about 2016.9842934386.

The spelling of 8205547218 in words is "eight billion, two hundred five million, five hundred forty-seven thousand, two hundred eighteen".