20111111192 has 16 divisors (see below), whose sum is σ = 37747182600. Its totient is φ = 10045195840.

The previous prime is 20111111191. The next prime is 20111111227. The reversal of 20111111192 is 29111111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111111191) 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 3 ways as a sum of consecutive naturals, for example, 1286717 + ... + 1302252.

Almost surely, 2^20111111192 is an apocalyptic number.

It is an amenable number.

20111111192 is a deficient number, since it is larger than the sum of its proper divisors (17636071408).

20111111192 is a wasteful number, since it uses less digits than its factorization.

20111111192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589946 (or 2589942 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 20111111192 its reverse (29111111102), we get a palindrome (49222222294).

The spelling of 20111111192 in words is "twenty billion, one hundred eleven million, one hundred eleven thousand, one hundred ninety-two".