23310331220 has 96 divisors (see below), whose sum is σ = 53825990400. Its totient is φ = 8409461760.

The previous prime is 23310331169. The next prime is 23310331223. The reversal of 23310331220 is 2213301332.

It is a super-2 number, since 2×23310331220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23310331192 and 23310331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23310331223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17889089 + ... + 17890391.

It is an arithmetic number, because the mean of its divisors is an integer number (560687400).

Almost surely, 2^23310331220 is an apocalyptic number.

23310331220 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 23310331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26912995200).

23310331220 is an abundant number, since it is smaller than the sum of its proper divisors (30515659180).

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

23310331220 is a wasteful number, since it uses less digits than its factorization.

23310331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23310331220 its reverse (2213301332), we get a palindrome (25523632552).

The spelling of 23310331220 in words is "twenty-three billion, three hundred ten million, three hundred thirty-one thousand, two hundred twenty".