23018 has 8 divisors (see below), whose sum is σ = 36612. Its totient is φ = 10816.

The previous prime is 23017. The next prime is 23021. The reversal of 23018 is 81032.

It can be written as a sum of positive squares in 2 ways, for example, as 17689 + 5329 = 133^2 + 73^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a junction number, because it is equal to n+sod(n) for n = 22993 and 23011.

It is not an unprimeable number, because it can be changed into a prime (23011) 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, 305 + ... + 372.

2²³⁰¹⁸ is an apocalyptic number.

23018 is a deficient number, since it is larger than the sum of its proper divisors (13594).

23018 is a wasteful number, since it uses less digits than its factorization.

23018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 23018 is about 151.7168415173. The cubic root of 23018 is about 28.4460866474.

Adding to 23018 its sum of digits (14), we get a palindrome (23032).

The spelling of 23018 in words is "twenty-three thousand, eighteen".