220320321232 has 80 divisors (see below), whose sum is σ = 493248787200. Its totient is φ = 94220472320.

The previous prime is 220320321209. The next prime is 220320321313. The reversal of 220320321232 is 232123023022.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9320244 + ... + 9343852.

It is an arithmetic number, because the mean of its divisors is an integer number (6165609840).

Almost surely, 2^220320321232 is an apocalyptic number.

220320321232 is a gapful number since it is divisible by the number (22) 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 220320321232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246624393600).

220320321232 is an abundant number, since it is smaller than the sum of its proper divisors (272928465968).

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

220320321232 is a wasteful number, since it uses less digits than its factorization.

220320321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26764 (or 26758 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 220320321232 its reverse (232123023022), we get a palindrome (452443344254).

The spelling of 220320321232 in words is "two hundred twenty billion, three hundred twenty million, three hundred twenty-one thousand, two hundred thirty-two".