21114443444 has 24 divisors (see below), whose sum is σ = 37431864960. Its totient is φ = 10419724224.

The previous prime is 21114443407. The next prime is 21114443473. The reversal of 21114443444 is 44434441112.

It is a super-2 number, since 2×21114443444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21114443444.

It is a congruent number.

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, 963392 + ... + 985064.

It is an arithmetic number, because the mean of its divisors is an integer number (1559661040).

Almost surely, 2^21114443444 is an apocalyptic number.

It is an amenable number.

21114443444 is a deficient number, since it is larger than the sum of its proper divisors (16317421516).

21114443444 is a wasteful number, since it uses less digits than its factorization.

21114443444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24839 (or 24837 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

Adding to 21114443444 its reverse (44434441112), we get a palindrome (65548884556).

The spelling of 21114443444 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-three thousand, four hundred forty-four".