20111011110 has 48 divisors (see below), whose sum is σ = 52507465920. Its totient is φ = 5340491520.

The previous prime is 20111011093. The next prime is 20111011153. The reversal of 20111011110 is 1111011102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20111011092 and 20111011101.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 445971 + ... + 488990.

It is an arithmetic number, because the mean of its divisors is an integer number (1093905540).

Almost surely, 2^20111011110 is an apocalyptic number.

20111011110 is an abundant number, since it is smaller than the sum of its proper divisors (32396454810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111011110 is a wasteful number, since it uses less digits than its factorization.

20111011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935213 (or 935210 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20111011110 its reverse (1111011102), we get a palindrome (21222022212).

The spelling of 20111011110 in words is "twenty billion, one hundred eleven million, eleven thousand, one hundred ten".