220983508818 has 54 divisors (see below), whose sum is σ = 482266496439. Its totient is φ = 73131319224.

The previous prime is 220983508817. The next prime is 220983508819. The reversal of 220983508818 is 818805389022.

220983508818 is a `hidden beast` number, since 2 + 209 + 8 + 350 + 8 + 81 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (220983508817) and next prime (220983508819).

It can be written as a sum of positive squares in only one way, i.e., 110491754409 + 110491754409 = 332403^2 + 332403^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332403.

It is a super-2 number, since 2×220983508818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220983508817) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 357000513 + ... + 357001131.

Almost surely, 2^220983508818 is an apocalyptic number.

220983508818 is an abundant number, since it is smaller than the sum of its proper divisors (261282987621).

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

220983508818 is an frugal number, since it uses more digits than its factorization.

220983508818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 220983508818 in words is "two hundred twenty billion, nine hundred eighty-three million, five hundred eight thousand, eight hundred eighteen".