20505110120 has 96 divisors (see below), whose sum is σ = 51112857600. Its totient is φ = 7397470080.

The previous prime is 20505110113. The next prime is 20505110141. The reversal of 20505110120 is 2101150502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598001 + ... + 631359.

It is an arithmetic number, because the mean of its divisors is an integer number (532425600).

Almost surely, 2^20505110120 is an apocalyptic number.

20505110120 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 20505110120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25556428800).

20505110120 is an abundant number, since it is smaller than the sum of its proper divisors (30607747480).

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

20505110120 is a wasteful number, since it uses less digits than its factorization.

20505110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33519 (or 33504 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 20505110120 its reverse (2101150502), we get a palindrome (22606260622).

The spelling of 20505110120 in words is "twenty billion, five hundred five million, one hundred ten thousand, one hundred twenty".