18486 has 24 divisors (see below), whose sum is σ = 43680.
Its totient is φ = 5616.
The previous prime is 18481. The next prime is 18493. The reversal of 18486 is 68481.
18486 is a modest number, since divided by 486 gives 18 as remainder.
It is a Curzon number.
It is a nialpdrome in base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18481) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195 + ... + 273.
It is an arithmetic number, because the mean of its divisors is an integer number (1820).
218486 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21840).
18486 is an abundant number, since it is smaller than the sum of its proper divisors (25194).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18486 is a wasteful number, since it uses less digits than its factorization.
18486 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 100 (or 97 counting only the distinct ones).
The product of its digits is 1536, while the sum is 27.
The square root of 18486 is about 135.9632303235.
The cubic root of 18486 is about 26.4411891470.
The spelling of 18486 in words is "eighteen thousand, four hundred eighty-six".