20000000111 has 32 divisors (see below), whose sum is σ = 24752407680. Its totient is φ = 15736375296.

The previous prime is 20000000089. The next prime is 20000000113. The reversal of 20000000111 is 11100000002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20000000111 - 2¹⁰ = 19999999087 is a prime.

20000000111 is a modest number, since divided by 111 gives 20 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20000000095 and 20000000104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000000113) 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 31 ways as a sum of consecutive naturals, for example, 23336795 + ... + 23337651.

It is an arithmetic number, because the mean of its divisors is an integer number (773512740).

Almost surely, 2^20000000111 is an apocalyptic number.

20000000111 is a deficient number, since it is larger than the sum of its proper divisors (4752407569).

20000000111 is a wasteful number, since it uses less digits than its factorization.

20000000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 20000000111 its reverse (11100000002), we get a palindrome (31100000113).

The spelling of 20000000111 in words is "twenty billion, one hundred eleven", and thus it is an aban number.