13218324 has 48 divisors (see below), whose sum is σ = 36210048. Its totient is φ = 3673728.

The previous prime is 13218313. The next prime is 13218347. The reversal of 13218324 is 42381231.

It is a junction number, because it is equal to n+sod(n) for n = 13218294 and 13218303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982 + ... + 5234.

It is an arithmetic number, because the mean of its divisors is an integer number (754376).

Almost surely, 2^13218324 is an apocalyptic number.

13218324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13218324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18105024).

13218324 is an abundant number, since it is smaller than the sum of its proper divisors (22991724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13218324 is a wasteful number, since it uses less digits than its factorization.

13218324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304 (or 4302 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 13218324 is about 3635.7013078634. The cubic root of 13218324 is about 236.4424573237.

Adding to 13218324 its reverse (42381231), we get a palindrome (55599555).

The spelling of 13218324 in words is "thirteen million, two hundred eighteen thousand, three hundred twenty-four".