23311220020 has 48 divisors (see below), whose sum is σ = 54411533568. Its totient is φ = 8316863360.

The previous prime is 23311220011. The next prime is 23311220021. The reversal of 23311220020 is 2002211332.

It is a junction number, because it is equal to n+sod(n) for n = 23311219976 and 23311220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311220021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987964 + ... + 1011283.

It is an arithmetic number, because the mean of its divisors is an integer number (1133573616).

Almost surely, 2^23311220020 is an apocalyptic number.

23311220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311220020 is an abundant number, since it is smaller than the sum of its proper divisors (31100313548).

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

23311220020 is a wasteful number, since it uses less digits than its factorization.

23311220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999320 (or 1999318 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23311220020 its reverse (2002211332), we get a palindrome (25313431352).

The spelling of 23311220020 in words is "twenty-three billion, three hundred eleven million, two hundred twenty thousand, twenty".