13821871104 has 132 divisors (see below), whose sum is σ = 41389259184. Its totient is φ = 4607207424.

The previous prime is 13821871099. The next prime is 13821871121. The reversal of 13821871104 is 40117812831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221059 + ... + 276605.

Almost surely, 2^13821871104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13821871104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20694629592).

13821871104 is an abundant number, since it is smaller than the sum of its proper divisors (27567388080).

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

13821871104 is an frugal number, since it uses more digits than its factorization.

13821871104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55582 (or 55552 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 13821871104 in words is "thirteen billion, eight hundred twenty-one million, eight hundred seventy-one thousand, one hundred four".