13011320 has 64 divisors (see below), whose sum is σ = 34560000. Its totient is φ = 4314240.

The previous prime is 13011319. The next prime is 13011337. The reversal of 13011320 is 2311031.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7931 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (540000).

Almost surely, 2^13011320 is an apocalyptic number.

13011320 is a gapful number since it is divisible by the number (10) 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 13011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17280000).

13011320 is an abundant number, since it is smaller than the sum of its proper divisors (21548680).

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

13011320 is a wasteful number, since it uses less digits than its factorization.

13011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 13011320 is about 3607.1207354343. The cubic root of 13011320 is about 235.2016979685.

Adding to 13011320 its reverse (2311031), we get a palindrome (15322351).

It can be divided in two parts, 13011 and 320, that added together give a palindrome (13331).

The spelling of 13011320 in words is "thirteen million, eleven thousand, three hundred twenty".