18379 has 2 divisors, whose sum is σ = 18380.
Its totient is φ = 18378.
The previous prime is 18371. The next prime is 18397. The reversal of 18379 is 97381.
Together with next prime (18397) it forms an Ormiston pair, because they use the same digits, order apart.
It is a weak prime.
It is an emirp because it is prime and its reverse (97381) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 18379 - 23 = 18371 is a prime.
It is a plaindrome in base 11 and base 14.
It is a nialpdrome in base 12.
It is not a weakly prime, because it can be changed into another prime (18371) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189 + 9190.
It is an arithmetic number, because the mean of its divisors is an integer number (9190).
218379 is an apocalyptic number.
18379 is a deficient number, since it is larger than the sum of its proper divisors (1).
18379 is an equidigital number, since it uses as much as digits as its factorization.
18379 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1512, while the sum is 28.
The square root of 18379 is about 135.5691705367.
The cubic root of 18379 is about 26.3900750877.
The spelling of 18379 in words is "eighteen thousand, three hundred seventy-nine".