21235530345244 has 12 divisors (see below), whose sum is σ = 37162450693368. Its totient is φ = 10617687290000.

The previous prime is 21235530345191. The next prime is 21235530345301. The reversal of 21235530345244 is 44254303553212.

21235530345244 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 21235530345244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18855007 + ... + 19949494.

It is an arithmetic number, because the mean of its divisors is an integer number (3096870891114).

Almost surely, 2^{21235530345244} is an apocalyptic number.

It is an amenable number.

21235530345244 is a deficient number, since it is larger than the sum of its proper divisors (15926920348124).

21235530345244 is a wasteful number, since it uses less digits than its factorization.

21235530345244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38941316 (or 38941314 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 21235530345244 its reverse (44254303553212), we get a palindrome (65489833898456).

The spelling of 21235530345244 in words is "twenty-one trillion, two hundred thirty-five billion, five hundred thirty million, three hundred forty-five thousand, two hundred forty-four".