20400130530 has 128 divisors (see below), whose sum is σ = 58638182400. Its totient is φ = 5017012992.

The previous prime is 20400130529. The next prime is 20400130571. The reversal of 20400130530 is 3503100402.

20400130530 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 0 + 130 + 530 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 5498316 + ... + 5502024.

It is an arithmetic number, because the mean of its divisors is an integer number (458110800).

Almost surely, 2^20400130530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20400130530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29319091200).

20400130530 is an abundant number, since it is smaller than the sum of its proper divisors (38238051870).

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

20400130530 is a wasteful number, since it uses less digits than its factorization.

20400130530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20400130530 its reverse (3503100402), we get a palindrome (23903230932).

The spelling of 20400130530 in words is "twenty billion, four hundred million, one hundred thirty thousand, five hundred thirty".