18150 has 36 divisors (see below), whose sum is σ = 49476. Its totient is φ = 4400.

The previous prime is 18149. The next prime is 18169. The reversal of 18150 is 5181.

It is a happy number.

18150 is nontrivially palindromic in base 14.

18150 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1645 + ... + 1655.

2¹⁸¹⁵⁰ is an apocalyptic number.

18150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24738).

18150 is an abundant number, since it is smaller than the sum of its proper divisors (31326).

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

18150 is a wasteful number, since it uses less digits than its factorization.

18150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 18150 is about 134.7219358531. The cubic root of 18150 is about 26.2800110275.

It can be divided in two parts, 181 and 50, that added together give a triangular number (231 = T₂₁).

The spelling of 18150 in words is "eighteen thousand, one hundred fifty".