20011111110 has 48 divisors (see below), whose sum is σ = 52515165456. Its totient is φ = 5286421824.

The previous prime is 20011111051. The next prime is 20011111129. The reversal of 20011111110 is 1111111002.

20011111110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×20011111110³ (a number of 32 digits) contains 333 as substring.

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 = 20011111092 and 20011111101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1029369 + ... + 1048628.

It is an arithmetic number, because the mean of its divisors is an integer number (1094065947).

Almost surely, 2^20011111110 is an apocalyptic number.

20011111110 is an abundant number, since it is smaller than the sum of its proper divisors (32504054346).

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

20011111110 is a wasteful number, since it uses less digits than its factorization.

20011111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078117 (or 2078114 counting only the distinct ones).

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

Adding to 20011111110 its reverse (1111111002), we get a palindrome (21122222112).

It can be divided in two parts, 2001 and 1111110, that added together give a palindrome (1113111).

The spelling of 20011111110 in words is "twenty billion, eleven million, one hundred eleven thousand, one hundred ten".