13720478850 has 144 divisors (see below), whose sum is σ = 39769329600. Its totient is φ = 3371276160.

The previous prime is 13720478839. The next prime is 13720478879. The reversal of 13720478850 is 5887402731.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 13720478796 and 13720478805.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3853371 + ... + 3856929.

It is an arithmetic number, because the mean of its divisors is an integer number (276175900).

Almost surely, 2^13720478850 is an apocalyptic number.

13720478850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13720478850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19884664800).

13720478850 is an abundant number, since it is smaller than the sum of its proper divisors (26048850750).

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

13720478850 is a wasteful number, since it uses less digits than its factorization.

13720478850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4241 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 13720478850 in words is "thirteen billion, seven hundred twenty million, four hundred seventy-eight thousand, eight hundred fifty".