2106020705 has 16 divisors (see below), whose sum is σ = 2662346880. Its totient is φ = 1594876032.

The previous prime is 2106020699. The next prime is 2106020731. The reversal of 2106020705 is 5070206012.

It is a cyclic number.

It is not a de Polignac number, because 2106020705 - 2¹⁰ = 2106019681 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121757 + ... + 137973.

It is an arithmetic number, because the mean of its divisors is an integer number (166396680).

Almost surely, 2^2106020705 is an apocalyptic number.

It is an amenable number.

2106020705 is a deficient number, since it is larger than the sum of its proper divisors (556326175).

2106020705 is a wasteful number, since it uses less digits than its factorization.

2106020705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17608.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2106020705 is about 45891.4012098127. The cubic root of 2106020705 is about 1281.8018051318.

Adding to 2106020705 its reverse (5070206012), we get a palindrome (7176226717).

The spelling of 2106020705 in words is "two billion, one hundred six million, twenty thousand, seven hundred five".