21443760000 has 960 divisors, whose sum is σ = 86990904000. Its totient is φ = 5031936000.

The previous prime is 21443759977. The next prime is 21443760043. The reversal of 21443760000 is 6734412.

21443760000 is a `hidden beast` number, since 2 + 14 + 43 + 7 + 600 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 271439961 + ... + 271440039.

It is an arithmetic number, because the mean of its divisors is an integer number (90615525).

Almost surely, 2^21443760000 is an apocalyptic number.

21443760000 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 21443760000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43495452000).

21443760000 is an abundant number, since it is smaller than the sum of its proper divisors (65547144000).

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

21443760000 is a wasteful number, since it uses less digits than its factorization.

21443760000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 21443760000 in words is "twenty-one billion, four hundred forty-three million, seven hundred sixty thousand".