20440205130 has 128 divisors (see below), whose sum is σ = 53210522880. Its totient is φ = 5008988160.

The previous prime is 20440205113. The next prime is 20440205131. The reversal of 20440205130 is 3150204402.

It is a junction number, because it is equal to n+sod(n) for n = 20440205097 and 20440205106.

It is not an unprimeable number, because it can be changed into a prime (20440205131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2534184 + ... + 2542236.

It is an arithmetic number, because the mean of its divisors is an integer number (415707210).

Almost surely, 2^20440205130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20440205130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26605261440).

20440205130 is an abundant number, since it is smaller than the sum of its proper divisors (32770317750).

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

20440205130 is a wasteful number, since it uses less digits than its factorization.

20440205130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20440205130 its reverse (3150204402), we get a palindrome (23590409532).

The spelling of 20440205130 in words is "twenty billion, four hundred forty million, two hundred five thousand, one hundred thirty".