13931021850 has 48 divisors (see below), whose sum is σ = 34703945472. Its totient is φ = 3698271360.

The previous prime is 13931021837. The next prime is 13931021911. The reversal of 13931021850 is 5812013931.

13931021850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 174787 + ... + 241686.

It is an arithmetic number, because the mean of its divisors is an integer number (722998864).

Almost surely, 2^13931021850 is an apocalyptic number.

13931021850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13931021850 is an abundant number, since it is smaller than the sum of its proper divisors (20772923622).

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

13931021850 is a wasteful number, since it uses less digits than its factorization.

13931021850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416711 (or 416706 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 13931021850 in words is "thirteen billion, nine hundred thirty-one million, twenty-one thousand, eight hundred fifty".