18017244 has 144 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 4717440.

The previous prime is 18017213. The next prime is 18017267. The reversal of 18017244 is 44271081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253729 + ... + 253799.

It is an arithmetic number, because the mean of its divisors is an integer number (393120).

Almost surely, 2^18017244 is an apocalyptic number.

18017244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18017244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

18017244 is an abundant number, since it is smaller than the sum of its proper divisors (38592036).

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

18017244 is a wasteful number, since it uses less digits than its factorization.

18017244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18017244 is about 4244.6724255236. The cubic root of 18017244 is about 262.1578017189.

It can be divided in two parts, 1801 and 7244, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 18017244 in words is "eighteen million, seventeen thousand, two hundred forty-four".