13813355720 has 64 divisors (see below), whose sum is σ = 32107622400. Its totient is φ = 5342941440.

The previous prime is 13813355711. The next prime is 13813355747. The reversal of 13813355720 is 2755331831.

13813355720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939526 + ... + 1946634.

It is an arithmetic number, because the mean of its divisors is an integer number (501681600).

Almost surely, 2^13813355720 is an apocalyptic number.

13813355720 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 13813355720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16053811200).

13813355720 is an abundant number, since it is smaller than the sum of its proper divisors (18294266680).

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

13813355720 is a wasteful number, since it uses less digits than its factorization.

13813355720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718 (or 8714 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 13813355720 in words is "thirteen billion, eight hundred thirteen million, three hundred fifty-five thousand, seven hundred twenty".