16813218 has 16 divisors (see below), whose sum is σ = 33669216. Its totient is φ = 5597280.

The previous prime is 16813211. The next prime is 16813249. The reversal of 16813218 is 81231861.

It is not an unprimeable number, because it can be changed into a prime (16813211) 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 7 ways as a sum of consecutive naturals, for example, 5830 + ... + 8222.

It is an arithmetic number, because the mean of its divisors is an integer number (2104326).

Almost surely, 2^16813218 is an apocalyptic number.

16813218 is an abundant number, since it is smaller than the sum of its proper divisors (16855998).

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

16813218 is a wasteful number, since it uses less digits than its factorization.

16813218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569.

The product of its digits is 2304, while the sum is 30.

The square root of 16813218 is about 4100.3924202447. The cubic root of 16813218 is about 256.1829848154.

The spelling of 16813218 in words is "sixteen million, eight hundred thirteen thousand, two hundred eighteen".