13111444320 has 384 divisors, whose sum is σ = 46187729280. Its totient is φ = 3105423360.

The previous prime is 13111444319. The next prime is 13111444321. The reversal of 13111444320 is 2344411131.

It is an interprime number because it is at equal distance from previous prime (13111444319) and next prime (13111444321).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111444321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25165660 + ... + 25166180.

It is an arithmetic number, because the mean of its divisors is an integer number (120280545).

Almost surely, 2^13111444320 is an apocalyptic number.

13111444320 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 13111444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23093864640).

13111444320 is an abundant number, since it is smaller than the sum of its proper divisors (33076284960).

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

13111444320 is a wasteful number, since it uses less digits than its factorization.

13111444320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 690 counting only the distinct ones).

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

Adding to 13111444320 its reverse (2344411131), we get a palindrome (15455855451).

The spelling of 13111444320 in words is "thirteen billion, one hundred eleven million, four hundred forty-four thousand, three hundred twenty".