5218018650 has 144 divisors (see below), whose sum is σ = 15570342720. Its totient is φ = 1284379200.

The previous prime is 5218018643. The next prime is 5218018657. The reversal of 5218018650 is 568108125.

5218018650 is a `hidden beast` number, since 521 + 8 + 0 + 1 + 86 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (5218018643) and next prime (5218018657).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5218018657) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 216715 + ... + 239585.

It is an arithmetic number, because the mean of its divisors is an integer number (108127380).

Almost surely, 2^5218018650 is an apocalyptic number.

5218018650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5218018650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7785171360).

5218018650 is an abundant number, since it is smaller than the sum of its proper divisors (10352324070).

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

5218018650 is a wasteful number, since it uses less digits than its factorization.

5218018650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918 (or 22894 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 5218018650 is about 72235.8543245666. The cubic root of 5218018650 is about 1734.4769883050.

The spelling of 5218018650 in words is "five billion, two hundred eighteen million, eighteen thousand, six hundred fifty".