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18022 = 29011
BaseRepresentation
bin100011001100110
3220201111
410121212
51034042
6215234
7103354
oct43146
926644
1018022
11125a4
12a51a
138284
1467d4
155517
hex4666

18022 has 4 divisors (see below), whose sum is σ = 27036. Its totient is φ = 9010.

The previous prime is 18013. The next prime is 18041. The reversal of 18022 is 22081.

18022 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22081 = 71311.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 17993 and 18011.

It is a congruent number.

It is an unprimeable number.

18022 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 as a sum of consecutive naturals, namely, 4504 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (6759).

218022 is an apocalyptic number.

18022 is a deficient number, since it is larger than the sum of its proper divisors (9014).

18022 is an equidigital number, since it uses as much as digits as its factorization.

18022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 18022 is about 134.2460427722. The cubic root of 18022 is about 26.2180866897.

It can be divided in two parts, 180 and 22, that added together give a palindrome (202).

The spelling of 18022 in words is "eighteen thousand, twenty-two".

Divisors: 1 2 9011 18022