21344234444 has 24 divisors (see below), whose sum is σ = 41206790688. Its totient is φ = 9610911360.

The previous prime is 21344234441. The next prime is 21344234473. The reversal of 21344234444 is 44443244312.

It is not an unprimeable number, because it can be changed into a prime (21344234441) 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, 5003552 + ... + 5007815.

It is an arithmetic number, because the mean of its divisors is an integer number (1716949612).

Almost surely, 2^21344234444 is an apocalyptic number.

It is an amenable number.

21344234444 is a deficient number, since it is larger than the sum of its proper divisors (19862556244).

21344234444 is a wasteful number, since it uses less digits than its factorization.

21344234444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011425 (or 10011423 counting only the distinct ones).

The product of its digits is 147456, while the sum is 35.

Adding to 21344234444 its reverse (44443244312), we get a palindrome (65787478756).

The spelling of 21344234444 in words is "twenty-one billion, three hundred forty-four million, two hundred thirty-four thousand, four hundred forty-four".