800020002011 has 4 divisors (see below), whose sum is σ = 800034021024. Its totient is φ = 800005983000.

The previous prime is 800020001971. The next prime is 800020002013. The reversal of 800020002011 is 110200020008.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800020002011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800020002013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6923555 + ... + 7038156.

It is an arithmetic number, because the mean of its divisors is an integer number (200008505256).

Almost surely, 2^800020002011 is an apocalyptic number.

800020002011 is a deficient number, since it is larger than the sum of its proper divisors (14019013).

800020002011 is a wasteful number, since it uses less digits than its factorization.

800020002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14019012.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 800020002011 its reverse (110200020008), we get a palindrome (910220022019).

The spelling of 800020002011 in words is "eight hundred billion, twenty million, two thousand, eleven".