13687120320 has 112 divisors (see below), whose sum is σ = 43480378368. Its totient is φ = 3647902720.

The previous prime is 13687120313. The next prime is 13687120351. The reversal of 13687120320 is 2302178631.

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, 2807485 + ... + 2812355.

It is an arithmetic number, because the mean of its divisors is an integer number (388217664).

Almost surely, 2^13687120320 is an apocalyptic number.

13687120320 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 13687120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21740189184).

13687120320 is an abundant number, since it is smaller than the sum of its proper divisors (29793258048).

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

13687120320 is a wasteful number, since it uses less digits than its factorization.

13687120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818 (or 7808 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 13687120320 its reverse (2302178631), we get a palindrome (15989298951).

The spelling of 13687120320 in words is "thirteen billion, six hundred eighty-seven million, one hundred twenty thousand, three hundred twenty".