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BaseRepresentation
bin100100001101000
3221102112
410201220
51043121
6221452
7105020
oct44150
927375
1018536
1112a21
12a888
13858b
146a80
15575b
hex4868

18536 has 16 divisors (see below), whose sum is σ = 39840. Its totient is φ = 7920.

The previous prime is 18523. The next prime is 18539. The reversal of 18536 is 63581.

18536 is nontrivially palindromic in base 11.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18539) 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 in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 221.

It is an arithmetic number, because the mean of its divisors is an integer number (2490).

218536 is an apocalyptic number.

It is an amenable number.

18536 is an abundant number, since it is smaller than the sum of its proper divisors (21304).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19920).

18536 is a wasteful number, since it uses less digits than its factorization.

18536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 340 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 18536 is about 136.1469794009. The cubic root of 18536 is about 26.4650066179.

The spelling of 18536 in words is "eighteen thousand, five hundred thirty-six".