20130344 has 32 divisors (see below), whose sum is σ = 41648040. Its totient is φ = 9062400.

The previous prime is 20130343. The next prime is 20130349. The reversal of 20130344 is 44303102.

It can be written as a sum of positive squares in 4 ways, for example, as 8773444 + 11356900 = 2962^2 + 3370^2 .

It is not an unprimeable number, because it can be changed into a prime (20130343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1904 + ... + 6624.

Almost surely, 2^20130344 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 20130344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20824020).

20130344 is an abundant number, since it is smaller than the sum of its proper divisors (21517696).

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

20130344 is a wasteful number, since it uses less digits than its factorization.

20130344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20130344 is about 4486.6851906502. The cubic root of 20130344 is about 272.0301653396.

Adding to 20130344 its reverse (44303102), we get a palindrome (64433446).

The spelling of 20130344 in words is "twenty million, one hundred thirty thousand, three hundred forty-four".