21103944876 has 96 divisors (see below), whose sum is σ = 62790210560. Its totient is φ = 6004627200.

The previous prime is 21103944863. The next prime is 21103944877. The reversal of 21103944876 is 67844930112.

21103944876 is a `hidden beast` number, since 211 + 0 + 394 + 48 + 7 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (21103944877) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 124281 + ... + 240111.

Almost surely, 2^21103944876 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 21103944876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395105280).

21103944876 is an abundant number, since it is smaller than the sum of its proper divisors (41686265684).

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

21103944876 is a wasteful number, since it uses less digits than its factorization.

21103944876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116092 (or 116084 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 21103944876 in words is "twenty-one billion, one hundred three million, nine hundred forty-four thousand, eight hundred seventy-six".