220118940 has 72 divisors (see below), whose sum is σ = 673021440. Its totient is φ = 58230144.

The previous prime is 220118929. The next prime is 220118953. The reversal of 220118940 is 49811022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18046 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (9347520).

Almost surely, 2^220118940 is an apocalyptic number.

220118940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220118940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336510720).

220118940 is an abundant number, since it is smaller than the sum of its proper divisors (452902500).

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

220118940 is a wasteful number, since it uses less digits than its factorization.

220118940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9771 (or 9766 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 220118940 is about 14836.4058990040. The cubic root of 220118940 is about 603.7898447271.

Adding to 220118940 its reverse (49811022), we get a palindrome (269929962).

The spelling of 220118940 in words is "two hundred twenty million, one hundred eighteen thousand, nine hundred forty".