13918 has 4 divisors (see below), whose sum is σ = 20880. Its totient is φ = 6958.

The previous prime is 13913. The next prime is 13921. The reversal of 13918 is 81931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3478 + ... + 3481.

It is an arithmetic number, because the mean of its divisors is an integer number (5220).

2¹³⁹¹⁸ is an apocalyptic number.

13918 is a deficient number, since it is larger than the sum of its proper divisors (6962).

13918 is an equidigital number, since it uses as much as digits as its factorization.

13918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6961.

The product of its digits is 216, while the sum is 22.

The square root of 13918 is about 117.9745735318. The cubic root of 13918 is about 24.0542753136.

The spelling of 13918 in words is "thirteen thousand, nine hundred eighteen".