20345020505232 has 40 divisors (see below), whose sum is σ = 52558887191520. Its totient is φ = 6781555107840.

The previous prime is 20345020505189. The next prime is 20345020505237. The reversal of 20345020505232 is 23250502054302.

It is a junction number, because it is equal to n+sod(n) for n = 20345020505193 and 20345020505202.

It is not an unprimeable number, because it can be changed into a prime (20345020505237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899857 + ... + 6442032.

It is an arithmetic number, because the mean of its divisors is an integer number (1313972179788).

Almost surely, 2^{20345020505232} is an apocalyptic number.

It is an amenable number.

20345020505232 is an abundant number, since it is smaller than the sum of its proper divisors (32213866686288).

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

20345020505232 is a wasteful number, since it uses less digits than its factorization.

20345020505232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7399631 (or 7399625 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 33.

Adding to 20345020505232 its reverse (23250502054302), we get a palindrome (43595522559534).

The spelling of 20345020505232 in words is "twenty trillion, three hundred forty-five billion, twenty million, five hundred five thousand, two hundred thirty-two".