2000815805 has 16 divisors (see below), whose sum is σ = 2529851520. Its totient is φ = 1514904768.

The previous prime is 2000815783. The next prime is 2000815829. The reversal of 2000815805 is 5085180002.

It is a cyclic number.

It is not a de Polignac number, because 2000815805 - 2³⁰ = 927073981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91079 + ... + 110891.

It is an arithmetic number, because the mean of its divisors is an integer number (158115720).

Almost surely, 2^2000815805 is an apocalyptic number.

It is an amenable number.

2000815805 is a deficient number, since it is larger than the sum of its proper divisors (529035715).

2000815805 is a wasteful number, since it uses less digits than its factorization.

2000815805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20900.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2000815805 is about 44730.4795972500. The cubic root of 2000815805 is about 1260.0923349231.

Adding to 2000815805 its reverse (5085180002), we get a palindrome (7085995807).

The spelling of 2000815805 in words is "two billion, eight hundred fifteen thousand, eight hundred five".