20002111011 has 12 divisors (see below), whose sum is σ = 28974727600. Its totient is φ = 13296530160.

The previous prime is 20002111009. The next prime is 20002111021. The reversal of 20002111011 is 11011120002.

It is a happy number.

It is not a de Polignac number, because 20002111011 - 2¹ = 20002111009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002110984 and 20002111002.

It is not an unprimeable number, because it can be changed into a prime (20002111001) 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 11 ways as a sum of consecutive naturals, for example, 3180895 + ... + 3187176.

Almost surely, 2^20002111011 is an apocalyptic number.

20002111011 is a deficient number, since it is larger than the sum of its proper divisors (8972616589).

20002111011 is a wasteful number, since it uses less digits than its factorization.

20002111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368426 (or 6368423 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20002111011 its reverse (11011120002), we get a palindrome (31013231013).

The spelling of 20002111011 in words is "twenty billion, two million, one hundred eleven thousand, eleven".