21144441303 has 12 divisors (see below), whose sum is σ = 30591479568. Its totient is φ = 14073444000.

The previous prime is 21144441301. The next prime is 21144441317. The reversal of 21144441303 is 30314444112.

21144441303 is a `hidden beast` number, since 211 + 4 + 4 + 441 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 21144441303 - 2¹ = 21144441301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144441301) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1898323 + ... + 1909428.

It is an arithmetic number, because the mean of its divisors is an integer number (2549289964).

Almost surely, 2^21144441303 is an apocalyptic number.

21144441303 is a deficient number, since it is larger than the sum of its proper divisors (9447038265).

21144441303 is a wasteful number, since it uses less digits than its factorization.

21144441303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808374 (or 3808371 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21144441303 its reverse (30314444112), we get a palindrome (51458885415).

The spelling of 21144441303 in words is "twenty-one billion, one hundred forty-four million, four hundred forty-one thousand, three hundred three".