8218520244 has 36 divisors (see below), whose sum is σ = 22663193280. Its totient is φ = 2490460560.

The previous prime is 8218520213. The next prime is 8218520257. The reversal of 8218520244 is 4420258128.

8218520244 is a `hidden beast` number, since 82 + 18 + 520 + 2 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 8218520199 and 8218520208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10376524 + ... + 10377315.

Almost surely, 2^8218520244 is an apocalyptic number.

It is an amenable number.

8218520244 is an abundant number, since it is smaller than the sum of its proper divisors (14444673036).

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

8218520244 is a wasteful number, since it uses less digits than its factorization.

8218520244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20753860 (or 20753855 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 8218520244 is about 90656.0546461184. The cubic root of 8218520244 is about 2018.0466890489.

The spelling of 8218520244 in words is "eight billion, two hundred eighteen million, five hundred twenty thousand, two hundred forty-four".