218321714484 has 72 divisors (see below), whose sum is σ = 561041307008. Its totient is φ = 71567971200.

The previous prime is 218321714477. The next prime is 218321714491. The reversal of 218321714484 is 484417123812.

218321714484 is a `hidden beast` number, since 2 + 1 + 8 + 32 + 171 + 448 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (218321714477) and next prime (218321714491).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1374309 + ... + 1524915.

Almost surely, 2^218321714484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218321714484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280520653504).

218321714484 is an abundant number, since it is smaller than the sum of its proper divisors (342719592524).

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

218321714484 is a wasteful number, since it uses less digits than its factorization.

218321714484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151285 (or 151280 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

It can be divided in two parts, 21832 and 1714484, that added together give a triangular number (1736316 = T₁₈₆₃).

The spelling of 218321714484 in words is "two hundred eighteen billion, three hundred twenty-one million, seven hundred fourteen thousand, four hundred eighty-four".