21113340044 has 96 divisors (see below), whose sum is σ = 39622066176. Its totient is φ = 9830419200.

The previous prime is 21113340041. The next prime is 21113340089. The reversal of 21113340044 is 44004331112.

It is not an unprimeable number, because it can be changed into a prime (21113340041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122042342 + ... + 122042514.

It is an arithmetic number, because the mean of its divisors is an integer number (412729856).

Almost surely, 2^21113340044 is an apocalyptic number.

It is an amenable number.

21113340044 is a deficient number, since it is larger than the sum of its proper divisors (18508726132).

21113340044 is a wasteful number, since it uses less digits than its factorization.

21113340044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21113340044 its reverse (44004331112), we get a palindrome (65117671156).

The spelling of 21113340044 in words is "twenty-one billion, one hundred thirteen million, three hundred forty thousand, forty-four".