20430044320 has 144 divisors (see below), whose sum is σ = 57664421640. Its totient is φ = 6815176704.

The previous prime is 20430044293. The next prime is 20430044363. The reversal of 20430044320 is 2344003402.

It can be written as a sum of positive squares in 4 ways, for example, as 19295432464 + 1134611856 = 138908^2 + 33684^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20430044291 and 20430044300.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254866 + ... + 325294.

Almost surely, 2^20430044320 is an apocalyptic number.

20430044320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430044320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28832210820).

20430044320 is an abundant number, since it is smaller than the sum of its proper divisors (37234377320).

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

20430044320 is a wasteful number, since it uses less digits than its factorization.

20430044320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70495 (or 70480 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20430044320 its reverse (2344003402), we get a palindrome (22774047722).

The spelling of 20430044320 in words is "twenty billion, four hundred thirty million, forty-four thousand, three hundred twenty".