13518634 has 4 divisors (see below), whose sum is σ = 20277954. Its totient is φ = 6759316.

The previous prime is 13518623. The next prime is 13518649. The reversal of 13518634 is 43681531.

13518634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43681531 = 23 ⋅1899197.

It can be written as a sum of positive squares in only one way, i.e., 10543009 + 2975625 = 3247^2 + 1725^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13518596 and 13518605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3379657 + ... + 3379660.

Almost surely, 2^13518634 is an apocalyptic number.

13518634 is a deficient number, since it is larger than the sum of its proper divisors (6759320).

13518634 is an equidigital number, since it uses as much as digits as its factorization.

13518634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759319.

The product of its digits is 8640, while the sum is 31.

The square root of 13518634 is about 3676.7695059658. The cubic root of 13518634 is about 238.2196616177.

It can be divided in two parts, 135 and 18634, that added together give a square (18769 = 137²).

The spelling of 13518634 in words is "thirteen million, five hundred eighteen thousand, six hundred thirty-four".