20440311330 has 16 divisors (see below), whose sum is σ = 49056747264. Its totient is φ = 5450749680.

The previous prime is 20440311319. The next prime is 20440311337. The reversal of 20440311330 is 3311304402.

It is a junction number, because it is equal to n+sod(n) for n = 20440311297 and 20440311306.

It is not an unprimeable number, because it can be changed into a prime (20440311337) 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, 340671826 + ... + 340671885.

It is an arithmetic number, because the mean of its divisors is an integer number (3066046704).

Almost surely, 2^20440311330 is an apocalyptic number.

20440311330 is an abundant number, since it is smaller than the sum of its proper divisors (28616435934).

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

20440311330 is a wasteful number, since it uses less digits than its factorization.

20440311330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681343721.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20440311330 its reverse (3311304402), we get a palindrome (23751615732).

The spelling of 20440311330 in words is "twenty billion, four hundred forty million, three hundred eleven thousand, three hundred thirty".