2105541020 has 24 divisors (see below), whose sum is σ = 4823603568. Its totient is φ = 765651200.

The previous prime is 2105541013. The next prime is 2105541029. The reversal of 2105541020 is 201455012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2105540983 and 2105541001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105541029) 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, 4785101 + ... + 4785540.

It is an arithmetic number, because the mean of its divisors is an integer number (200983482).

Almost surely, 2^2105541020 is an apocalyptic number.

2105541020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105541020 is an abundant number, since it is smaller than the sum of its proper divisors (2718062548).

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

2105541020 is a wasteful number, since it uses less digits than its factorization.

2105541020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570661 (or 9570659 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2105541020 is about 45886.1746063016. The cubic root of 2105541020 is about 1281.7044797533.

Adding to 2105541020 its reverse (201455012), we get a palindrome (2306996032).

The spelling of 2105541020 in words is "two billion, one hundred five million, five hundred forty-one thousand, twenty".