2105340305 has 8 divisors (see below), whose sum is σ = 2636252352. Its totient is φ = 1611042928.

The previous prime is 2105340257. The next prime is 2105340311. The reversal of 2105340305 is 5030435012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2105340305 - 2⁶ = 2105340241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 9153539 + ... + 9153768.

It is an arithmetic number, because the mean of its divisors is an integer number (329531544).

Almost surely, 2^2105340305 is an apocalyptic number.

It is an amenable number.

2105340305 is a deficient number, since it is larger than the sum of its proper divisors (530912047).

2105340305 is a wasteful number, since it uses less digits than its factorization.

2105340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18307335.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 2105340305 is about 45883.9874574998. The cubic root of 2105340305 is about 1281.6637514263.

Adding to 2105340305 its reverse (5030435012), we get a palindrome (7135775317).

The spelling of 2105340305 in words is "two billion, one hundred five million, three hundred forty thousand, three hundred five".