21044112108 has 48 divisors (see below), whose sum is σ = 52429445376. Its totient is φ = 6553673280.

The previous prime is 21044112101. The next prime is 21044112109. The reversal of 21044112108 is 80121144012.

It is not an unprimeable number, because it can be changed into a prime (21044112101) 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 15 ways as a sum of consecutive naturals, for example, 874723 + ... + 898458.

It is an arithmetic number, because the mean of its divisors is an integer number (1092280112).

Almost surely, 2^21044112108 is an apocalyptic number.

It is an amenable number.

21044112108 is an abundant number, since it is smaller than the sum of its proper divisors (31385333268).

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

21044112108 is a wasteful number, since it uses less digits than its factorization.

21044112108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773254 (or 1773252 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The spelling of 21044112108 in words is "twenty-one billion, forty-four million, one hundred twelve thousand, one hundred eight".