13520111424 has 112 divisors (see below), whose sum is σ = 38267566848. Its totient is φ = 4197777408.

The previous prime is 13520111399. The next prime is 13520111443. The reversal of 13520111424 is 42411102531.

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

It is a junction number, because it is equal to n+sod(n) for n = 13520111394 and 13520111403.

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, 295257 + ... + 337959.

It is an arithmetic number, because the mean of its divisors is an integer number (341674704).

Almost surely, 2^13520111424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13520111424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19133783424).

13520111424 is an abundant number, since it is smaller than the sum of its proper divisors (24747455424).

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

13520111424 is a wasteful number, since it uses less digits than its factorization.

13520111424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832 (or 42822 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 13520111424 its reverse (42411102531), we get a palindrome (55931213955).

The spelling of 13520111424 in words is "thirteen billion, five hundred twenty million, one hundred eleven thousand, four hundred twenty-four".