16818219 has 32 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 9590400.

The previous prime is 16818209. The next prime is 16818227. The reversal of 16818219 is 91281861.

It is not a de Polignac number, because 16818219 - 2⁵ = 16818187 is a prime.

It is a super-2 number, since 2×16818219² = 565704980663922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16818209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3384 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (899640).

Almost surely, 2^16818219 is an apocalyptic number.

16818219 is a deficient number, since it is larger than the sum of its proper divisors (11970261).

16818219 is a wasteful number, since it uses less digits than its factorization.

16818219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368 (or 3362 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 16818219 is about 4101.0021945861. The cubic root of 16818219 is about 256.2083823747.

The spelling of 16818219 in words is "sixteen million, eight hundred eighteen thousand, two hundred nineteen".