2105689345 has 8 divisors (see below), whose sum is σ = 2659818240. Its totient is φ = 1595890800.

The previous prime is 2105689331. The next prime is 2105689349. The reversal of 2105689345 is 5439865012.

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

It is a de Polignac number, because none of the positive numbers 2^k-2105689345 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105689349) 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, 11082481 + ... + 11082670.

It is an arithmetic number, because the mean of its divisors is an integer number (332477280).

Almost surely, 2^2105689345 is an apocalyptic number.

It is an amenable number.

2105689345 is a deficient number, since it is larger than the sum of its proper divisors (554128895).

2105689345 is a wasteful number, since it uses less digits than its factorization.

2105689345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22165175.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2105689345 is about 45887.7908053983. The cubic root of 2105689345 is about 1281.7345756370.

The spelling of 2105689345 in words is "two billion, one hundred five million, six hundred eighty-nine thousand, three hundred forty-five".