218132018 has 24 divisors (see below), whose sum is σ = 355989168. Its totient is φ = 100197552.

The previous prime is 218132017. The next prime is 218132063. The reversal of 218132018 is 810231812.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (218132017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75305 + ... + 78147.

It is an arithmetic number, because the mean of its divisors is an integer number (14832882).

Almost surely, 2^218132018 is an apocalyptic number.

218132018 is a deficient number, since it is larger than the sum of its proper divisors (137857150).

218132018 is a wasteful number, since it uses less digits than its factorization.

218132018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098 (or 3085 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 218132018 is about 14769.2930771923. The cubic root of 218132018 is about 601.9676310672.

The spelling of 218132018 in words is "two hundred eighteen million, one hundred thirty-two thousand, eighteen".