13683218 has 4 divisors (see below), whose sum is σ = 20524830. Its totient is φ = 6841608.

The previous prime is 13683199. The next prime is 13683247. The reversal of 13683218 is 81238631.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8543929 + 5139289 = 2923^2 + 2267^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420803 + ... + 3420806.

Almost surely, 2^13683218 is an apocalyptic number.

13683218 is a deficient number, since it is larger than the sum of its proper divisors (6841612).

13683218 is an equidigital number, since it uses as much as digits as its factorization.

13683218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841611.

The product of its digits is 6912, while the sum is 32.

The square root of 13683218 is about 3699.0833999790. The cubic root of 13683218 is about 239.1825079583.

The spelling of 13683218 in words is "thirteen million, six hundred eighty-three thousand, two hundred eighteen".