21441544992 has 720 divisors, whose sum is σ = 79857328320. Its totient is φ = 5509140480.

The previous prime is 21441544979. The next prime is 21441545051. The reversal of 21441544992 is 29944514412.

21441544992 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 154 + 499 + 2 = 666.

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, 522964492 + ... + 522964532.

It is an arithmetic number, because the mean of its divisors is an integer number (110912956).

Almost surely, 2^21441544992 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 21441544992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39928664160).

21441544992 is an abundant number, since it is smaller than the sum of its proper divisors (58415783328).

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

21441544992 is a wasteful number, since it uses less digits than its factorization.

21441544992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 109 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 21441544992 in words is "twenty-one billion, four hundred forty-one million, five hundred forty-four thousand, nine hundred ninety-two".