23111110020 has 48 divisors (see below), whose sum is σ = 68517646848. Its totient is φ = 5800435200.

The previous prime is 23111110007. The next prime is 23111110031. The reversal of 23111110020 is 2001111132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 23111109978 and 23111110005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11327956 + ... + 11329995.

It is an arithmetic number, because the mean of its divisors is an integer number (1427450976).

Almost surely, 2^23111110020 is an apocalyptic number.

23111110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23111110020 is an abundant number, since it is smaller than the sum of its proper divisors (45406536828).

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

23111110020 is a wasteful number, since it uses less digits than its factorization.

23111110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22657980 (or 22657978 counting only the distinct ones).

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

Adding to 23111110020 its reverse (2001111132), we get a palindrome (25112221152).

The spelling of 23111110020 in words is "twenty-three billion, one hundred eleven million, one hundred ten thousand, twenty".