218713824220 has 24 divisors (see below), whose sum is σ = 460530411264. Its totient is φ = 87250981056.

The previous prime is 218713824193. The next prime is 218713824223. The reversal of 218713824220 is 22428317812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218713824223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14651644 + ... + 14666563.

It is an arithmetic number, because the mean of its divisors is an integer number (19188767136).

Almost surely, 2^218713824220 is an apocalyptic number.

218713824220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218713824220 is an abundant number, since it is smaller than the sum of its proper divisors (241816587044).

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

218713824220 is a wasteful number, since it uses less digits than its factorization.

218713824220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29318589 (or 29318587 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 218713824220 in words is "two hundred eighteen billion, seven hundred thirteen million, eight hundred twenty-four thousand, two hundred twenty".