20111116 has 12 divisors (see below), whose sum is σ = 35296632. Its totient is φ = 10026368.

The previous prime is 20111093. The next prime is 20111137. The reversal of 20111116 is 61111102.

It is a junction number, because it is equal to n+sod(n) for n = 20111096 and 20111105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5710 + ... + 8533.

It is an arithmetic number, because the mean of its divisors is an integer number (2941386).

Almost surely, 2^20111116 is an apocalyptic number.

It is an amenable number.

20111116 is a deficient number, since it is larger than the sum of its proper divisors (15185516).

20111116 is a wasteful number, since it uses less digits than its factorization.

20111116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14600 (or 14598 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 20111116 is about 4484.5418941069. The cubic root of 20111116 is about 271.9435256166.

Adding to 20111116 its reverse (61111102), we get a palindrome (81222218).

The spelling of 20111116 in words is "twenty million, one hundred eleven thousand, one hundred sixteen".