21441882500 has 60 divisors (see below), whose sum is σ = 47188629180. Its totient is φ = 8521968000.

The previous prime is 21441882479. The next prime is 21441882557. The reversal of 21441882500 is 528814412.

It can be written as a sum of positive squares in 10 ways, for example, as 16808085316 + 4633797184 = 129646^2 + 68072^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 365186 + ... + 419814.

It is an arithmetic number, because the mean of its divisors is an integer number (786477153).

Almost surely, 2^21441882500 is an apocalyptic number.

21441882500 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 21441882500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23594314590).

21441882500 is an abundant number, since it is smaller than the sum of its proper divisors (25746746680).

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

21441882500 is a wasteful number, since it uses less digits than its factorization.

21441882500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54810 (or 54793 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 21441882500 in words is "twenty-one billion, four hundred forty-one million, eight hundred eighty-two thousand, five hundred".