2104705345 has 4 divisors (see below), whose sum is σ = 2525646420. Its totient is φ = 1683764272.

The previous prime is 2104705319. The next prime is 2104705397. The reversal of 2104705345 is 5435074012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 771506176 + 1333199169 = 27776^2 + 36513^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104705345 - 2⁷ = 2104705217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210470530 + ... + 210470539.

It is an arithmetic number, because the mean of its divisors is an integer number (631411605).

Almost surely, 2^2104705345 is an apocalyptic number.

It is an amenable number.

2104705345 is a deficient number, since it is larger than the sum of its proper divisors (420941075).

2104705345 is an equidigital number, since it uses as much as digits as its factorization.

2104705345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420941074.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 2104705345 is about 45877.0677463153. The cubic root of 2104705345 is about 1281.5348907000.

Adding to 2104705345 its reverse (5435074012), we get a palindrome (7539779357).

The spelling of 2104705345 in words is "two billion, one hundred four million, seven hundred five thousand, three hundred forty-five".