20530305412204 has 96 divisors (see below), whose sum is σ = 43281643991040. Its totient is φ = 8324057793600.

The previous prime is 20530305412163. The next prime is 20530305412229. The reversal of 20530305412204 is 40221450303502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1987247319 + ... + 1987257649.

It is an arithmetic number, because the mean of its divisors is an integer number (450850458240).

Almost surely, 2^{20530305412204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530305412204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21640821995520).

20530305412204 is an abundant number, since it is smaller than the sum of its proper divisors (22751338578836).

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

20530305412204 is a wasteful number, since it uses less digits than its factorization.

20530305412204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15179 (or 15177 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20530305412204 its reverse (40221450303502), we get a palindrome (60751755715706).

The spelling of 20530305412204 in words is "twenty trillion, five hundred thirty billion, three hundred five million, four hundred twelve thousand, two hundred four".