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18146 = 243211

18146 has 8 divisors (see below), whose sum is σ = 27984. Its totient is φ = 8820.

The previous prime is 18143. The next prime is 18149. The reversal of 18146 is 64181.

It is an interprime number because it is at equal distance from previous prime (18143) and next prime (18149).

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

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 18146 parts by 190 straight cuts.

It is a Curzon number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18146.

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

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 + ... + 191.

It is an arithmetic number, because the mean of its divisors is an integer number (3498).

218146 is an apocalyptic number.

18146 is a deficient number, since it is larger than the sum of its proper divisors (9838).

18146 is a wasteful number, since it uses less digits than its factorization.

18146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its digits is 192, while the sum is 20.

The square root of 18146 is about 134.7070896427. The cubic root of 18146 is about 26.2780803063.

It can be divided in two parts, 18 and 146, that multiplied together give a triangular number (2628 = T72).

The spelling of 18146 in words is "eighteen thousand, one hundred forty-six".

Divisors: 1 2 43 86 211 422 9073 18146