20311000111 has 4 divisors (see below), whose sum is σ = 20512099224. Its totient is φ = 20109901000.

The previous prime is 20311000079. The next prime is 20311000139. The reversal of 20311000111 is 11100011302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20311000111 - 2⁵ = 20311000079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311000141) 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, 100549405 + ... + 100549606.

It is an arithmetic number, because the mean of its divisors is an integer number (5128024806).

Almost surely, 2^20311000111 is an apocalyptic number.

20311000111 is a deficient number, since it is larger than the sum of its proper divisors (201099113).

20311000111 is a wasteful number, since it uses less digits than its factorization.

20311000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201099112.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 20311000111 its reverse (11100011302), we get a palindrome (31411011413).

The spelling of 20311000111 in words is "twenty billion, three hundred eleven million, one hundred eleven", and thus it is an aban number.