21105334000 has 80 divisors (see below), whose sum is σ = 51245621856. Its totient is φ = 8406912000.

The previous prime is 21105333989. The next prime is 21105334057. The reversal of 21105334000 is 43350112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460107 + ... + 503893.

Almost surely, 2^21105334000 is an apocalyptic number.

21105334000 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 21105334000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25622810928).

21105334000 is an abundant number, since it is smaller than the sum of its proper divisors (30140287856).

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

21105334000 is a wasteful number, since it uses less digits than its factorization.

21105334000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44051 (or 44035 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 21105334000 its reverse (43350112), we get a palindrome (21148684112).

The spelling of 21105334000 in words is "twenty-one billion, one hundred five million, three hundred thirty-four thousand".