20345344 has 40 divisors (see below), whose sum is σ = 41247360. Its totient is φ = 10023936.

The previous prime is 20345293. The next prime is 20345357. The reversal of 20345344 is 44354302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40197 + ... + 40699.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^20345344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20345344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20623680).

20345344 is an abundant number, since it is smaller than the sum of its proper divisors (20902016).

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

20345344 is an frugal number, since it uses more digits than its factorization.

20345344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 20345344 is about 4510.5813372558. The cubic root of 20345344 is about 272.9952008889.

Adding to 20345344 its reverse (44354302), we get a palindrome (64699646).

The spelling of 20345344 in words is "twenty million, three hundred forty-five thousand, three hundred forty-four".