21443511342244 has 24 divisors (see below), whose sum is σ = 39794412942648. Its totient is φ = 10075610749440.

The previous prime is 21443511342167. The next prime is 21443511342251. The reversal of 21443511342244 is 44224311534412.

It can be written as a sum of positive squares in 4 ways, for example, as 4123864332900 + 17319647009344 = 2030730^2 + 4161688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21443511342197 and 21443511342206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241414827 + ... + 241503634.

It is an arithmetic number, because the mean of its divisors is an integer number (1658100539277).

Almost surely, 2^{21443511342244} is an apocalyptic number.

It is an amenable number.

21443511342244 is a deficient number, since it is larger than the sum of its proper divisors (18350901600404).

21443511342244 is a wasteful number, since it uses less digits than its factorization.

21443511342244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482919135 (or 482919133 counting only the distinct ones).

The product of its digits is 368640, while the sum is 40.

Adding to 21443511342244 its reverse (44224311534412), we get a palindrome (65667822876656).

The spelling of 21443511342244 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, three hundred forty-two thousand, two hundred forty-four".