21344310330 has 128 divisors (see below), whose sum is σ = 61129728000. Its totient is φ = 4765142592.

The previous prime is 21344310311. The next prime is 21344310409. The reversal of 21344310330 is 3301344312.

It is a self number, because there is not a number n which added to its sum of digits gives 21344310330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 418351 + ... + 466589.

It is an arithmetic number, because the mean of its divisors is an integer number (477576000).

Almost surely, 2^21344310330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21344310330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30564864000).

21344310330 is an abundant number, since it is smaller than the sum of its proper divisors (39785417670).

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

21344310330 is a wasteful number, since it uses less digits than its factorization.

21344310330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48313 (or 48299 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21344310330 its reverse (3301344312), we get a palindrome (24645654642).

The spelling of 21344310330 in words is "twenty-one billion, three hundred forty-four million, three hundred ten thousand, three hundred thirty".