21320033224344 has 128 divisors (see below), whose sum is σ = 57452449824000. Its totient is φ = 6569149317120.

The previous prime is 21320033224291. The next prime is 21320033224349. The reversal of 21320033224344 is 44342233002312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320033224349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3128307 + ... + 7240605.

It is an arithmetic number, because the mean of its divisors is an integer number (448847264250).

Almost surely, 2^{21320033224344} is an apocalyptic number.

21320033224344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21320033224344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28726224912000).

21320033224344 is an abundant number, since it is smaller than the sum of its proper divisors (36132416599656).

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

21320033224344 is a wasteful number, since it uses less digits than its factorization.

21320033224344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112553 (or 4112549 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 21320033224344 its reverse (44342233002312), we get a palindrome (65662266226656).

The spelling of 21320033224344 in words is "twenty-one trillion, three hundred twenty billion, thirty-three million, two hundred twenty-four thousand, three hundred forty-four".