16818019 has 4 divisors (see below), whose sum is σ = 16828344. Its totient is φ = 16807696.

The previous prime is 16818001. The next prime is 16818023. The reversal of 16818019 is 91081861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91081861 = 13 ⋅7006297.

It is a cyclic number.

It is not a de Polignac number, because 16818019 - 2⁵ = 16817987 is a prime.

It is a super-2 number, since 2×16818019² = 565691526168722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16818029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (4207086).

Almost surely, 2^16818019 is an apocalyptic number.

16818019 is a deficient number, since it is larger than the sum of its proper divisors (10325).

16818019 is an equidigital number, since it uses as much as digits as its factorization.

16818019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 16818019 is about 4100.9778102301. The cubic root of 16818019 is about 256.2073667721.

The spelling of 16818019 in words is "sixteen million, eight hundred eighteen thousand, nineteen".