220020318 has 24 divisors (see below), whose sum is σ = 544812528. Its totient is φ = 62862912.

The previous prime is 220020313. The next prime is 220020343. The reversal of 220020318 is 813020022.

It is a happy number.

It is a super-2 number, since 2×220020318² = 96817880665642248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 220020318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872971 + ... + 873222.

It is an arithmetic number, because the mean of its divisors is an integer number (22700522).

Almost surely, 2^220020318 is an apocalyptic number.

220020318 is an abundant number, since it is smaller than the sum of its proper divisors (324792210).

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

220020318 is a wasteful number, since it uses less digits than its factorization.

220020318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746208 (or 1746205 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 220020318 is about 14833.0818780185. The cubic root of 220020318 is about 603.6996573381.

The spelling of 220020318 in words is "two hundred twenty million, twenty thousand, three hundred eighteen".