21441043535 has 16 divisors (see below), whose sum is σ = 27248076000. Its totient is φ = 16140681216.

The previous prime is 21441043493. The next prime is 21441043567. The reversal of 21441043535 is 53534014412.

It is a cyclic number.

It is not a de Polignac number, because 21441043535 - 2¹⁴ = 21441027151 is a prime.

It is a super-3 number, since 3×21441043535³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469391 + ... + 513039.

It is an arithmetic number, because the mean of its divisors is an integer number (1703004750).

Almost surely, 2^21441043535 is an apocalyptic number.

21441043535 is a deficient number, since it is larger than the sum of its proper divisors (5807032465).

21441043535 is a wasteful number, since it uses less digits than its factorization.

21441043535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49450.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21441043535 its reverse (53534014412), we get a palindrome (74975057947).

The spelling of 21441043535 in words is "twenty-one billion, four hundred forty-one million, forty-three thousand, five hundred thirty-five".