13311018 has 48 divisors (see below), whose sum is σ = 33359040. Its totient is φ = 3757248.

The previous prime is 13311007. The next prime is 13311031. The reversal of 13311018 is 81011331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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, 10621 + ... + 11807.

It is an arithmetic number, because the mean of its divisors is an integer number (694980).

Almost surely, 2^13311018 is an apocalyptic number.

13311018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13311018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16679520).

13311018 is an abundant number, since it is smaller than the sum of its proper divisors (20048022).

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

13311018 is a wasteful number, since it uses less digits than its factorization.

13311018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 13311018 is about 3648.4267842455. The cubic root of 13311018 is about 236.9938576627.

Adding to 13311018 its reverse (81011331), we get a palindrome (94322349).

The spelling of 13311018 in words is "thirteen million, three hundred eleven thousand, eighteen".