18803 has 2 divisors, whose sum is σ = 18804.
Its totient is φ = 18802.
The previous prime is 18797. The next prime is 18839. The reversal of 18803 is 30881.
It is a weak prime.
It is an emirp because it is prime and its reverse (30881) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 18803 - 24 = 18787 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a plaindrome in base 15.
It is not a weakly prime, because it can be changed into another prime (18503) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401 + 9402.
It is an arithmetic number, because the mean of its divisors is an integer number (9402).
218803 is an apocalyptic number.
18803 is a deficient number, since it is larger than the sum of its proper divisors (1).
18803 is an equidigital number, since it uses as much as digits as its factorization.
18803 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 192, while the sum is 20.
The square root of 18803 is about 137.1240314460.
The cubic root of 18803 is about 26.5914721942.
The spelling of 18803 in words is "eighteen thousand, eight hundred three".