23330111220 has 144 divisors (see below), whose sum is σ = 76275959760. Its totient is φ = 5737955328.

The previous prime is 23330111213. The next prime is 23330111227. The reversal of 23330111220 is 2211103332.

23330111220 is a `hidden beast` number, since 2 + 3 + 330 + 111 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (23330111213) and next prime (23330111227).

It can be written as a sum of positive squares in 8 ways, for example, as 9446673636 + 13883437584 = 97194^2 + 117828^2 .

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 = 23330111193 and 23330111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23330111227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3340372 + ... + 3347348.

It is an arithmetic number, because the mean of its divisors is an integer number (529694165).

Almost surely, 2^23330111220 is an apocalyptic number.

23330111220 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 23330111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38137979880).

23330111220 is an abundant number, since it is smaller than the sum of its proper divisors (52945848540).

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

23330111220 is a wasteful number, since it uses less digits than its factorization.

23330111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434 (or 8429 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23330111220 its reverse (2211103332), we get a palindrome (25541214552).

The spelling of 23330111220 in words is "twenty-three billion, three hundred thirty million, one hundred eleven thousand, two hundred twenty".