21413034444 has 24 divisors (see below), whose sum is σ = 49969286640. Its totient is φ = 7136886784.

The previous prime is 21413034439. The next prime is 21413034449. The reversal of 21413034444 is 44443031412.

It is an interprime number because it is at equal distance from previous prime (21413034439) and next prime (21413034449).

It is not an unprimeable number, because it can be changed into a prime (21413034449) 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 7 ways as a sum of consecutive naturals, for example, 19492 + ... + 207860.

It is an arithmetic number, because the mean of its divisors is an integer number (2082053610).

Almost surely, 2^21413034444 is an apocalyptic number.

It is an amenable number.

21413034444 is an abundant number, since it is smaller than the sum of its proper divisors (28556252196).

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

21413034444 is a wasteful number, since it uses less digits than its factorization.

21413034444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197849 (or 197847 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21413034444 its reverse (44443031412), we get a palindrome (65856065856).

The spelling of 21413034444 in words is "twenty-one billion, four hundred thirteen million, thirty-four thousand, four hundred forty-four".