13243818 has 48 divisors (see below), whose sum is σ = 31173984. Its totient is φ = 3739680.

The previous prime is 13243793. The next prime is 13243819. The reversal of 13243818 is 81834231.

It is not an unprimeable number, because it can be changed into a prime (13243819) 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 23 ways as a sum of consecutive naturals, for example, 31248 + ... + 31668.

It is an arithmetic number, because the mean of its divisors is an integer number (649458).

Almost surely, 2^13243818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13243818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15586992).

13243818 is an abundant number, since it is smaller than the sum of its proper divisors (17930166).

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

13243818 is a wasteful number, since it uses less digits than its factorization.

13243818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 540 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 13243818 is about 3639.2056825632. The cubic root of 13243818 is about 236.5943674768.

The spelling of 13243818 in words is "thirteen million, two hundred forty-three thousand, eight hundred eighteen".