20440443130 has 8 divisors (see below), whose sum is σ = 36792797652. Its totient is φ = 8176177248.

The previous prime is 20440443097. The next prime is 20440443139. The reversal of 20440443130 is 3134404402.

It can be written as a sum of positive squares in 2 ways, for example, as 19715810569 + 724632561 = 140413^2 + 26919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20440443095 and 20440443104.

It is not an unprimeable number, because it can be changed into a prime (20440443139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022022147 + ... + 1022022166.

Almost surely, 2^20440443130 is an apocalyptic number.

20440443130 is a deficient number, since it is larger than the sum of its proper divisors (16352354522).

20440443130 is a wasteful number, since it uses less digits than its factorization.

20440443130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044044320.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20440443130 its reverse (3134404402), we get a palindrome (23574847532).

The spelling of 20440443130 in words is "twenty billion, four hundred forty million, four hundred forty-three thousand, one hundred thirty".