20520430260 has 192 divisors, whose sum is σ = 65744179200. Its totient is φ = 4733752320.

The previous prime is 20520430211. The next prime is 20520430279. The reversal of 20520430260 is 6203402502.

It is a self number, because there is not a number n which added to its sum of digits gives 20520430260.

It is a congruent number.

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, 3017424 + ... + 3024216.

It is an arithmetic number, because the mean of its divisors is an integer number (342417600).

Almost surely, 2^20520430260 is an apocalyptic number.

20520430260 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 20520430260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32872089600).

20520430260 is an abundant number, since it is smaller than the sum of its proper divisors (45223748940).

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

20520430260 is a wasteful number, since it uses less digits than its factorization.

20520430260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038 (or 7036 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20520430260 its reverse (6203402502), we get a palindrome (26723832762).

The spelling of 20520430260 in words is "twenty billion, five hundred twenty million, four hundred thirty thousand, two hundred sixty".