13518923 has 4 divisors (see below), whose sum is σ = 14747928. Its totient is φ = 12289920.

The previous prime is 13518887. The next prime is 13518977. The reversal of 13518923 is 32981531.

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

It is a cyclic number.

It is not a de Polignac number, because 13518923 - 2¹⁰ = 13517899 is a prime.

It is a super-2 number, since 2×13518923² = 365522558159858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13518923.

It is not an unprimeable number, because it can be changed into a prime (13518983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614486 + ... + 614507.

It is an arithmetic number, because the mean of its divisors is an integer number (3686982).

Almost surely, 2^13518923 is an apocalyptic number.

13518923 is a deficient number, since it is larger than the sum of its proper divisors (1229005).

13518923 is a wasteful number, since it uses less digits than its factorization.

13518923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229004.

The product of its digits is 6480, while the sum is 32.

The square root of 13518923 is about 3676.8088065604. The cubic root of 13518923 is about 238.2213591510.

It can be divided in two parts, 13518 and 923, that added together give a palindrome (14441).

The spelling of 13518923 in words is "thirteen million, five hundred eighteen thousand, nine hundred twenty-three".