23111321020 has 12 divisors (see below), whose sum is σ = 48533774184. Its totient is φ = 9244528400.

The previous prime is 23111321003. The next prime is 23111321021. The reversal of 23111321020 is 2012311132.

It is a junction number, because it is equal to n+sod(n) for n = 23111320985 and 23111321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111321021) 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, 577783006 + ... + 577783045.

It is an arithmetic number, because the mean of its divisors is an integer number (4044481182).

Almost surely, 2^23111321020 is an apocalyptic number.

23111321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23111321020 is an abundant number, since it is smaller than the sum of its proper divisors (25422453164).

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

23111321020 is a wasteful number, since it uses less digits than its factorization.

23111321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155566060 (or 1155566058 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23111321020 its reverse (2012311132), we get a palindrome (25123632152).

The spelling of 23111321020 in words is "twenty-three billion, one hundred eleven million, three hundred twenty-one thousand, twenty".