2208819818 has 16 divisors (see below), whose sum is σ = 3347688960. Its totient is φ = 1092948336.

The previous prime is 2208819817. The next prime is 2208819853. The reversal of 2208819818 is 8189188022.

It is a super-3 number, since 3×2208819818³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2208819817) 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 7 ways as a sum of consecutive naturals, for example, 187655 + ... + 199077.

It is an arithmetic number, because the mean of its divisors is an integer number (209230560).

Almost surely, 2^2208819818 is an apocalyptic number.

2208819818 is a deficient number, since it is larger than the sum of its proper divisors (1138869142).

2208819818 is a wasteful number, since it uses less digits than its factorization.

2208819818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12421.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 2208819818 is about 46998.0831311236. The cubic root of 2208819818 is about 1302.3271566726.

The spelling of 2208819818 in words is "two billion, two hundred eight million, eight hundred nineteen thousand, eight hundred eighteen".