16818358 has 4 divisors (see below), whose sum is σ = 25227540. Its totient is φ = 8409178.

The previous prime is 16818353. The next prime is 16818377. The reversal of 16818358 is 85381861.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16818358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16818353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204588 + ... + 4204591.

It is an arithmetic number, because the mean of its divisors is an integer number (6306885).

Almost surely, 2^16818358 is an apocalyptic number.

16818358 is a deficient number, since it is larger than the sum of its proper divisors (8409182).

16818358 is an equidigital number, since it uses as much as digits as its factorization.

16818358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409181.

The product of its digits is 46080, while the sum is 40.

The square root of 16818358 is about 4101.0191416281. The cubic root of 16818358 is about 256.2090882137.

The spelling of 16818358 in words is "sixteen million, eight hundred eighteen thousand, three hundred fifty-eight".