21035443050 has 144 divisors (see below), whose sum is σ = 58096415520. Its totient is φ = 5453723520.

The previous prime is 21035442997. The next prime is 21035443081. The reversal of 21035443050 is 5034453012.

21035443050 is a `hidden beast` number, since 2 + 1 + 0 + 354 + 4 + 305 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4390056 + ... + 4394844.

It is an arithmetic number, because the mean of its divisors is an integer number (403447330).

Almost surely, 2^21035443050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21035443050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29048207760).

21035443050 is an abundant number, since it is smaller than the sum of its proper divisors (37060972470).

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

21035443050 is a wasteful number, since it uses less digits than its factorization.

21035443050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077 (or 5069 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 21035443050 its reverse (5034453012), we get a palindrome (26069896062).

The spelling of 21035443050 in words is "twenty-one billion, thirty-five million, four hundred forty-three thousand, fifty".