23423440220 has 48 divisors (see below), whose sum is σ = 50567515488. Its totient is φ = 9108464640.

The previous prime is 23423440219. The next prime is 23423440241. The reversal of 23423440220 is 2204432432.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 23423440220.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 181592 + ... + 282528.

It is an arithmetic number, because the mean of its divisors is an integer number (1053489906).

Almost surely, 2^23423440220 is an apocalyptic number.

23423440220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23423440220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25283757744).

23423440220 is an abundant number, since it is smaller than the sum of its proper divisors (27144075268).

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

23423440220 is a wasteful number, since it uses less digits than its factorization.

23423440220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101270 (or 101268 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 23423440220 its reverse (2204432432), we get a palindrome (25627872652).

The spelling of 23423440220 in words is "twenty-three billion, four hundred twenty-three million, four hundred forty thousand, two hundred twenty".