16818165 has 96 divisors (see below), whose sum is σ = 37820160. Its totient is φ = 6905088.

The previous prime is 16818163. The next prime is 16818187. The reversal of 16818165 is 56181861.

It is not a de Polignac number, because 16818165 - 2¹ = 16818163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16818163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 454527 + ... + 454563.

It is an arithmetic number, because the mean of its divisors is an integer number (393960).

Almost surely, 2^16818165 is an apocalyptic number.

16818165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16818165 is an abundant number, since it is smaller than the sum of its proper divisors (21001995).

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

16818165 is a wasteful number, since it uses less digits than its factorization.

16818165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 65 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 16818165 is about 4100.9956108243. The cubic root of 16818165 is about 256.2081081628.

Adding to 16818165 its sum of digits (36), we get a square (16818201 = 4101²).

The spelling of 16818165 in words is "sixteen million, eight hundred eighteen thousand, one hundred sixty-five".