23123221020 has 72 divisors (see below), whose sum is σ = 70211756160. Its totient is φ = 6159922560.

The previous prime is 23123221019. The next prime is 23123221031. The reversal of 23123221020 is 2012232132.

23123221020 is a `hidden beast` number, since 2 + 312 + 322 + 10 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23123220984 and 23123221002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113566 + ... + 243194.

It is an arithmetic number, because the mean of its divisors is an integer number (975163280).

Almost surely, 2^23123221020 is an apocalyptic number.

23123221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23123221020 is an abundant number, since it is smaller than the sum of its proper divisors (47088535140).

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

23123221020 is a wasteful number, since it uses less digits than its factorization.

23123221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130635 (or 130630 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23123221020 its reverse (2012232132), we get a palindrome (25135453152).

It can be divided in two parts, 231232 and 21020, that added together give a palindrome (252252).

The spelling of 23123221020 in words is "twenty-three billion, one hundred twenty-three million, two hundred twenty-one thousand, twenty".