21411012444 has 96 divisors (see below), whose sum is σ = 53038272000. Its totient is φ = 6714005760.

The previous prime is 21411012443. The next prime is 21411012449. The reversal of 21411012444 is 44421011412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411012443) 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 31 ways as a sum of consecutive naturals, for example, 1591257 + ... + 1604655.

It is an arithmetic number, because the mean of its divisors is an integer number (552482000).

Almost surely, 2^21411012444 is an apocalyptic number.

It is an amenable number.

21411012444 is an abundant number, since it is smaller than the sum of its proper divisors (31627259556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21411012444 is a wasteful number, since it uses less digits than its factorization.

21411012444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13563 (or 13561 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 21411012444 its reverse (44421011412), we get a palindrome (65832023856).

The spelling of 21411012444 in words is "twenty-one billion, four hundred eleven million, twelve thousand, four hundred forty-four".