21204341444 has 72 divisors (see below), whose sum is σ = 43898988672. Its totient is φ = 8883838080.

The previous prime is 21204341443. The next prime is 21204341467. The reversal of 21204341444 is 44414340212.

It is not an unprimeable number, because it can be changed into a prime (21204341443) 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 23 ways as a sum of consecutive naturals, for example, 6341237 + ... + 6344579.

It is an arithmetic number, because the mean of its divisors is an integer number (609708176).

Almost surely, 2^21204341444 is an apocalyptic number.

It is an amenable number.

21204341444 is an abundant number, since it is smaller than the sum of its proper divisors (22694647228).

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

21204341444 is a wasteful number, since it uses less digits than its factorization.

21204341444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21204341444 its reverse (44414340212), we get a palindrome (65618681656).

The spelling of 21204341444 in words is "twenty-one billion, two hundred four million, three hundred forty-one thousand, four hundred forty-four".