16990218 has 96 divisors (see below), whose sum is σ = 45527040. Its totient is φ = 4471200.

The previous prime is 16990217. The next prime is 16990219. The reversal of 16990218 is 81209961.

It is an interprime number because it is at equal distance from previous prime (16990217) and next prime (16990219).

It is not an unprimeable number, because it can be changed into a prime (16990213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112443 + ... + 112593.

It is an arithmetic number, because the mean of its divisors is an integer number (474240).

Almost surely, 2^16990218 is an apocalyptic number.

16990218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16990218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22763520).

16990218 is an abundant number, since it is smaller than the sum of its proper divisors (28536822).

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

16990218 is a wasteful number, since it uses less digits than its factorization.

16990218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 16990218 is about 4121.9192131821. The cubic root of 16990218 is about 257.0788314141.

The spelling of 16990218 in words is "sixteen million, nine hundred ninety thousand, two hundred eighteen".