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18141 = 36047

18141 has 4 divisors (see below), whose sum is σ = 24192. Its totient is φ = 12092.

The previous prime is 18133. The next prime is 18143. The reversal of 18141 is 14181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18141 - 23 = 18133 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18141.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18141.

It is not an unprimeable number, because it can be changed into a prime (18143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3021 + ... + 3026.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

218141 is an apocalyptic number.

It is an amenable number.

18141 is a deficient number, since it is larger than the sum of its proper divisors (6051).

18141 is an equidigital number, since it uses as much as digits as its factorization.

18141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050.

The product of its digits is 32, while the sum is 15.

The square root of 18141 is about 134.6885295784. The cubic root of 18141 is about 26.2756665058.

It can be divided in two parts, 181 and 41, that added together give a palindrome (222).

The spelling of 18141 in words is "eighteen thousand, one hundred forty-one".

Divisors: 1 3 6047 18141