20505342130 has 96 divisors (see below), whose sum is σ = 46338264000. Its totient is φ = 6475593600.

The previous prime is 20505342079. The next prime is 20505342131. The reversal of 20505342130 is 3124350502.

It is a junction number, because it is equal to n+sod(n) for n = 20505342095 and 20505342104.

It is not an unprimeable number, because it can be changed into a prime (20505342131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3175405 + ... + 3181855.

It is an arithmetic number, because the mean of its divisors is an integer number (482690250).

Almost surely, 2^20505342130 is an apocalyptic number.

20505342130 is an abundant number, since it is smaller than the sum of its proper divisors (25832921870).

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

20505342130 is a wasteful number, since it uses less digits than its factorization.

20505342130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984 (or 6977 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20505342130 its reverse (3124350502), we get a palindrome (23629692632).

The spelling of 20505342130 in words is "twenty billion, five hundred five million, three hundred forty-two thousand, one hundred thirty".