20430313530 has 128 divisors (see below), whose sum is σ = 56685484800. Its totient is φ = 4665292800.

The previous prime is 20430313511. The next prime is 20430313583. The reversal of 20430313530 is 3531303402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430313530.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 366336 + ... + 418404.

It is an arithmetic number, because the mean of its divisors is an integer number (442855350).

Almost surely, 2^20430313530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430313530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28342742400).

20430313530 is an abundant number, since it is smaller than the sum of its proper divisors (36255171270).

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

20430313530 is a wasteful number, since it uses less digits than its factorization.

20430313530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52160.

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 20430313530 its reverse (3531303402), we get a palindrome (23961616932).

The spelling of 20430313530 in words is "twenty billion, four hundred thirty million, three hundred thirteen thousand, five hundred thirty".