13881375920 has 120 divisors (see below), whose sum is σ = 33691870368. Its totient is φ = 5318231040.

The previous prime is 13881375917. The next prime is 13881375929. The reversal of 13881375920 is 2957318831.

It is not an unprimeable number, because it can be changed into a prime (13881375929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7917764 + ... + 7919516.

Almost surely, 2^13881375920 is an apocalyptic number.

13881375920 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 13881375920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16845935184).

13881375920 is an abundant number, since it is smaller than the sum of its proper divisors (19810494448).

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

13881375920 is a wasteful number, since it uses less digits than its factorization.

13881375920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 13881375920 in words is "thirteen billion, eight hundred eighty-one million, three hundred seventy-five thousand, nine hundred twenty".