18479 has 4 divisors (see below), whose sum is σ = 19584. Its totient is φ = 17376.

The previous prime is 18461. The next prime is 18481. The reversal of 18479 is 97481.

18479 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97481 = 43 ⋅2267.

It is a cyclic number.

It is not a de Polignac number, because 18479 - 2⁸ = 18223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18439) 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, 527 + ... + 560.

It is an arithmetic number, because the mean of its divisors is an integer number (4896).

2¹⁸⁴⁷⁹ is an apocalyptic number.

18479 is a deficient number, since it is larger than the sum of its proper divisors (1105).

18479 is a wasteful number, since it uses less digits than its factorization.

18479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 2016, while the sum is 29.

The square root of 18479 is about 135.9374856322. The cubic root of 18479 is about 26.4378512753.

The spelling of 18479 in words is "eighteen thousand, four hundred seventy-nine".