20110020011 has 4 divisors (see below), whose sum is σ = 20117943000. Its totient is φ = 20102097024.

The previous prime is 20110019981. The next prime is 20110020037. The reversal of 20110020011 is 11002001102.

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-20110020011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110020041) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3957686 + ... + 3962763.

It is an arithmetic number, because the mean of its divisors is an integer number (5029485750).

Almost surely, 2^20110020011 is an apocalyptic number.

20110020011 is a deficient number, since it is larger than the sum of its proper divisors (7922989).

20110020011 is an equidigital number, since it uses as much as digits as its factorization.

20110020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922988.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20110020011 its reverse (11002001102), we get a palindrome (31112021113).

The spelling of 20110020011 in words is "twenty billion, one hundred ten million, twenty thousand, eleven".