320421445032 has 128 divisors (see below), whose sum is σ = 917445916800. Its totient is φ = 92382609408.

The previous prime is 320421444997. The next prime is 320421445037. The reversal of 320421445032 is 230544124023.

It is not an unprimeable number, because it can be changed into a prime (320421445037) 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, 1070944 + ... + 1337072.

It is an arithmetic number, because the mean of its divisors is an integer number (7167546225).

Almost surely, 2^320421445032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320421445032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458722958400).

320421445032 is an abundant number, since it is smaller than the sum of its proper divisors (597024471768).

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

320421445032 is a wasteful number, since it uses less digits than its factorization.

320421445032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266395 (or 266391 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 320421445032 its reverse (230544124023), we get a palindrome (550965569055).

The spelling of 320421445032 in words is "three hundred twenty billion, four hundred twenty-one million, four hundred forty-five thousand, thirty-two".