20000111011 has 4 divisors (see below), whose sum is σ = 20000428432. Its totient is φ = 19999793592.

The previous prime is 20000110987. The next prime is 20000111039. The reversal of 20000111011 is 11011100002.

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-20000111011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000110985 and 20000111003.

It is not an unprimeable number, because it can be changed into a prime (20000115011) 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, 28695 + ... + 202048.

It is an arithmetic number, because the mean of its divisors is an integer number (5000107108).

Almost surely, 2^20000111011 is an apocalyptic number.

20000111011 is a deficient number, since it is larger than the sum of its proper divisors (317421).

20000111011 is an equidigital number, since it uses as much as digits as its factorization.

20000111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317420.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20000111011 its reverse (11011100002), we get a palindrome (31011211013).

The spelling of 20000111011 in words is "twenty billion, one hundred eleven thousand, eleven".