18783 has 6 divisors (see below), whose sum is σ = 27144. Its totient is φ = 12516.

The previous prime is 18773. The next prime is 18787. The reversal of 18783 is 38781.

It is not a de Polignac number, because 18783 - 2⁶ = 18719 is a prime.

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

18783 is a lucky number.

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 (18787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1035 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (4524).

2¹⁸⁷⁸³ is an apocalyptic number.

18783 is a deficient number, since it is larger than the sum of its proper divisors (8361).

18783 is a wasteful number, since it uses less digits than its factorization.

18783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093 (or 2090 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 18783 is about 137.0510853660. The cubic root of 18783 is about 26.5820407539.

It can be divided in two parts, 1878 and 3, that added together give a palindrome (1881).

The spelling of 18783 in words is "eighteen thousand, seven hundred eighty-three".