21014044441 has 16 divisors (see below), whose sum is σ = 23926593600. Its totient is φ = 18295651008.

The previous prime is 21014044427. The next prime is 21014044453. The reversal of 21014044441 is 14444041012.

It is a cyclic number.

It is not a de Polignac number, because 21014044441 - 2⁹ = 21014043929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21014044421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 131326 + ... + 243463.

It is an arithmetic number, because the mean of its divisors is an integer number (1495412100).

Almost surely, 2^21014044441 is an apocalyptic number.

It is an amenable number.

21014044441 is a deficient number, since it is larger than the sum of its proper divisors (2912549159).

21014044441 is a wasteful number, since it uses less digits than its factorization.

21014044441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375048.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21014044441 its reverse (14444041012), we get a palindrome (35458085453).

The spelling of 21014044441 in words is "twenty-one billion, fourteen million, forty-four thousand, four hundred forty-one".