18079 has 4 divisors (see below), whose sum is σ = 18360.
Its totient is φ = 17800.
The previous prime is 18077. The next prime is 18089. The reversal of 18079 is 97081.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 18079 - 21 = 18077 is a prime.
It is a Duffinian number.
It is a plaindrome in base 16.
It is a nialpdrome in base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18077) 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, 12 + ... + 190.
It is an arithmetic number, because the mean of its divisors is an integer number (4590).
218079 is an apocalyptic number.
18079 is a deficient number, since it is larger than the sum of its proper divisors (281).
18079 is a wasteful number, since it uses less digits than its factorization.
18079 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 280.
The product of its (nonzero) digits is 504, while the sum is 25.
The square root of 18079 is about 134.4581719346.
The cubic root of 18079 is about 26.2456984637.
The spelling of 18079 in words is "eighteen thousand, seventy-nine".