218111388330 has 256 divisors, whose sum is σ = 591077025792. Its totient is φ = 51063168000.

The previous prime is 218111388263. The next prime is 218111388337. The reversal of 218111388330 is 33883111812.

218111388330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218111388337) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 282161824 + ... + 282162596.

It is an arithmetic number, because the mean of its divisors is an integer number (2308894632).

Almost surely, 2^218111388330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218111388330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295538512896).

218111388330 is an abundant number, since it is smaller than the sum of its proper divisors (372965637462).

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

218111388330 is a wasteful number, since it uses less digits than its factorization.

218111388330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093.

The product of its (nonzero) digits is 27648, while the sum is 39.

It can be divided in two parts, 21811 and 1388330, that added together give a palindrome (1410141).

The spelling of 218111388330 in words is "two hundred eighteen billion, one hundred eleven million, three hundred eighty-eight thousand, three hundred thirty".