18016 has 12 divisors (see below), whose sum is σ = 35532. Its totient is φ = 8992.

The previous prime is 18013. The next prime is 18041. The reversal of 18016 is 61081.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a plaindrome in base 11 and base 14.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250 + ... + 313.

It is an arithmetic number, because the mean of its divisors is an integer number (2961).

2¹⁸⁰¹⁶ is an apocalyptic number.

18016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18016 is a deficient number, since it is larger than the sum of its proper divisors (17516).

18016 is an equidigital number, since it uses as much as digits as its factorization.

18016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 18016 is about 134.2236938845. The cubic root of 18016 is about 26.2151768021.

Adding to 18016 its reverse (61081), we get a palindrome (79097).

It can be divided in two parts, 180 and 16, that added together give a square (196 = 14²).

The spelling of 18016 in words is "eighteen thousand, sixteen".