2105503120 has 80 divisors (see below), whose sum is σ = 5603569920. Its totient is φ = 720732672.

The previous prime is 2105503117. The next prime is 2105503129. The reversal of 2105503120 is 213055012.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2105503129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394389 + ... + 399691.

It is an arithmetic number, because the mean of its divisors is an integer number (70044624).

Almost surely, 2^2105503120 is an apocalyptic number.

2105503120 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 2105503120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2801784960).

2105503120 is an abundant number, since it is smaller than the sum of its proper divisors (3498066800).

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

2105503120 is a wasteful number, since it uses less digits than its factorization.

2105503120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6032 (or 6026 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2105503120 is about 45885.7616260208. The cubic root of 2105503120 is about 1281.6967894272.

Adding to 2105503120 its reverse (213055012), we get a palindrome (2318558132).

The spelling of 2105503120 in words is "two billion, one hundred five million, five hundred three thousand, one hundred twenty".