23918 has 4 divisors (see below), whose sum is σ = 35880. Its totient is φ = 11958.

The previous prime is 23917. The next prime is 23929. The reversal of 23918 is 81932.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23893 and 23902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978 + ... + 5981.

It is an arithmetic number, because the mean of its divisors is an integer number (8970).

2²³⁹¹⁸ is an apocalyptic number.

23918 is a deficient number, since it is larger than the sum of its proper divisors (11962).

23918 is a wasteful number, since it uses less digits than its factorization.

23918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961.

The product of its digits is 432, while the sum is 23.

The square root of 23918 is about 154.6544535408. The cubic root of 23918 is about 28.8121026808.

The spelling of 23918 in words is "twenty-three thousand, nine hundred eighteen".