21344441330 has 16 divisors (see below), whose sum is σ = 39357068184. Its totient is φ = 8329537920.

The previous prime is 21344441297. The next prime is 21344441333. The reversal of 21344441330 is 3314444312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16809900409 + 4534540921 = 129653^2 + 67339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21344441293 and 21344441302.

It is not an unprimeable number, because it can be changed into a prime (21344441333) 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, 26029397 + ... + 26030216.

Almost surely, 2^21344441330 is an apocalyptic number.

21344441330 is a deficient number, since it is larger than the sum of its proper divisors (18012626854).

21344441330 is a wasteful number, since it uses less digits than its factorization.

21344441330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52059661.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21344441330 its reverse (3314444312), we get a palindrome (24658885642).

The spelling of 21344441330 in words is "twenty-one billion, three hundred forty-four million, four hundred forty-one thousand, three hundred thirty".