220122018 has 24 divisors (see below), whose sum is σ = 504986508. Its totient is φ = 69057792.

The previous prime is 220122017. The next prime is 220122043. The reversal of 220122018 is 810221022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219721329 + 400689 = 14823^2 + 633^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220122017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359371 + ... + 359982.

Almost surely, 2^220122018 is an apocalyptic number.

220122018 is an abundant number, since it is smaller than the sum of its proper divisors (284864490).

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

220122018 is a wasteful number, since it uses less digits than its factorization.

220122018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719378 (or 719375 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 220122018 is about 14836.5096299635. The cubic root of 220122018 is about 603.7926590487.

The spelling of 220122018 in words is "two hundred twenty million, one hundred twenty-two thousand, eighteen".