21104436000 has 192 divisors, whose sum is σ = 69258309120. Its totient is φ = 5618073600.

The previous prime is 21104435977. The next prime is 21104436013. The reversal of 21104436000 is 63440112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9226857 + ... + 9229143.

It is an arithmetic number, because the mean of its divisors is an integer number (360720360).

Almost surely, 2^21104436000 is an apocalyptic number.

21104436000 is a gapful number since it is divisible by the number (20) 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 21104436000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34629154560).

21104436000 is an abundant number, since it is smaller than the sum of its proper divisors (48153873120).

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

21104436000 is a wasteful number, since it uses less digits than its factorization.

21104436000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21104436000 its reverse (63440112), we get a palindrome (21167876112).

The spelling of 21104436000 in words is "twenty-one billion, one hundred four million, four hundred thirty-six thousand".