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18338 = 253173
BaseRepresentation
bin100011110100010
3221011012
410132202
51041323
6220522
7104315
oct43642
927135
1018338
1112861
12a742
138468
14697c
155678
hex47a2

18338 has 8 divisors (see below), whose sum is σ = 28188. Its totient is φ = 8944.

The previous prime is 18329. The next prime is 18341. The reversal of 18338 is 83381.

18338 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 2209 = 127^2 + 47^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is an unprimeable number.

18338 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 192.

218338 is an apocalyptic number.

18338 is a deficient number, since it is larger than the sum of its proper divisors (9850).

18338 is a wasteful number, since it uses less digits than its factorization.

18338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228.

The product of its digits is 576, while the sum is 23.

The square root of 18338 is about 135.4178717895. The cubic root of 18338 is about 26.3704367569.

It can be divided in two parts, 18 and 338, that multiplied together give a square (6084 = 782).

The spelling of 18338 in words is "eighteen thousand, three hundred thirty-eight".

Divisors: 1 2 53 106 173 346 9169 18338