23311020020 has 48 divisors (see below), whose sum is σ = 49402678080. Its totient is φ = 9239049216.

The previous prime is 23311020013. The next prime is 23311020101. The reversal of 23311020020 is 2002011332.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23311019977 and 23311020004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1445924 + ... + 1461956.

It is an arithmetic number, because the mean of its divisors is an integer number (1029222460).

Almost surely, 2^23311020020 is an apocalyptic number.

23311020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311020020 is an abundant number, since it is smaller than the sum of its proper divisors (26091658060).

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

23311020020 is a wasteful number, since it uses less digits than its factorization.

23311020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16704 (or 16702 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 23311020020 its reverse (2002011332), we get a palindrome (25313031352).

The spelling of 23311020020 in words is "twenty-three billion, three hundred eleven million, twenty thousand, twenty".