20001111011 has 16 divisors (see below), whose sum is σ = 23408030400. Its totient is φ = 17082717120.

The previous prime is 20001110989. The next prime is 20001111049. The reversal of 20001111011 is 11011110002.

It is a happy number.

It is not a de Polignac number, because 20001111011 - 2⁶ = 20001110947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001111011.

It is not an unprimeable number, because it can be changed into a prime (20001111071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7376 + ... + 200141.

It is an arithmetic number, because the mean of its divisors is an integer number (1463001900).

Almost surely, 2^20001111011 is an apocalyptic number.

20001111011 is a deficient number, since it is larger than the sum of its proper divisors (3406919389).

20001111011 is an equidigital number, since it uses as much as digits as its factorization.

20001111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207819 (or 207805 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20001111011 its reverse (11011110002), we get a palindrome (31012221013).

The spelling of 20001111011 in words is "twenty billion, one million, one hundred eleven thousand, eleven".