220818916 has 12 divisors (see below), whose sum is σ = 409164588. Its totient is φ = 103914752.

The previous prime is 220818911. The next prime is 220818937. The reversal of 220818916 is 619818022.

It can be written as a sum of positive squares in 2 ways, for example, as 130644900 + 90174016 = 11430^2 + 9496^2 .

It is not an unprimeable number, because it can be changed into a prime (220818911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623601 + ... + 1623736.

It is an arithmetic number, because the mean of its divisors is an integer number (34097049).

Almost surely, 2^220818916 is an apocalyptic number.

It is an amenable number.

220818916 is a deficient number, since it is larger than the sum of its proper divisors (188345672).

220818916 is a wasteful number, since it uses less digits than its factorization.

220818916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247358 (or 3247356 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 220818916 is about 14859.9769851773. The cubic root of 220818916 is about 604.4291827063.

The spelling of 220818916 in words is "two hundred twenty million, eight hundred eighteen thousand, nine hundred sixteen".