2105655020 has 96 divisors (see below), whose sum is σ = 5452126848. Its totient is φ = 666611712.

The previous prime is 2105655017. The next prime is 2105655043. The reversal of 2105655020 is 205565012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117794 + ... + 134486.

It is an arithmetic number, because the mean of its divisors is an integer number (56792988).

Almost surely, 2^2105655020 is an apocalyptic number.

2105655020 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 2105655020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2726063424).

2105655020 is an abundant number, since it is smaller than the sum of its proper divisors (3346471828).

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

2105655020 is a wasteful number, since it uses less digits than its factorization.

2105655020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16779 (or 16777 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2105655020 is about 45887.4167937137. The cubic root of 2105655020 is about 1281.7276110487.

The spelling of 2105655020 in words is "two billion, one hundred five million, six hundred fifty-five thousand, twenty".