13518493 has 4 divisors (see below), whose sum is σ = 13747680. Its totient is φ = 13289308.

The previous prime is 13518473. The next prime is 13518499. The reversal of 13518493 is 39481531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39481531 = 17 ⋅2322443.

It is a cyclic number.

It is not a de Polignac number, because 13518493 - 2¹⁷ = 13387421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13518499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114505 + ... + 114622.

It is an arithmetic number, because the mean of its divisors is an integer number (3436920).

Almost surely, 2^13518493 is an apocalyptic number.

It is an amenable number.

13518493 is a deficient number, since it is larger than the sum of its proper divisors (229187).

13518493 is an equidigital number, since it uses as much as digits as its factorization.

13518493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229186.

The product of its digits is 12960, while the sum is 34.

The square root of 13518493 is about 3676.7503314748. The cubic root of 13518493 is about 238.2188334007.

The spelling of 13518493 in words is "thirteen million, five hundred eighteen thousand, four hundred ninety-three".