220423320 has 144 divisors (see below), whose sum is σ = 775934640. Its totient is φ = 54243072.

The previous prime is 220423297. The next prime is 220423321. The reversal of 220423320 is 23324022.

220423320 is a `hidden beast` number, since 220 + 423 + 3 + 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 = 220423293 and 220423302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220423321) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59029 + ... + 62651.

It is an arithmetic number, because the mean of its divisors is an integer number (5388435).

Almost surely, 2^220423320 is an apocalyptic number.

220423320 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 220423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387967320).

220423320 is an abundant number, since it is smaller than the sum of its proper divisors (555511320).

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

220423320 is a wasteful number, since it uses less digits than its factorization.

220423320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666 (or 3646 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 220423320 is about 14846.6602305030. The cubic root of 220423320 is about 604.0680229808.

Adding to 220423320 its reverse (23324022), we get a palindrome (243747342).

The spelling of 220423320 in words is "two hundred twenty million, four hundred twenty-three thousand, three hundred twenty".