320432004020 has 24 divisors (see below), whose sum is σ = 672918430464. Its totient is φ = 128170664096.

The previous prime is 320432004001. The next prime is 320432004047. The reversal of 320432004020 is 20400234023.

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 = 320432003983 and 320432004001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1729097 + ... + 1905423.

It is an arithmetic number, because the mean of its divisors is an integer number (28038267936).

Almost surely, 2^320432004020 is an apocalyptic number.

It is an amenable number.

320432004020 is an abundant number, since it is smaller than the sum of its proper divisors (352486426444).

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

320432004020 is a wasteful number, since it uses less digits than its factorization.

320432004020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267199 (or 267197 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 320432004020 its reverse (20400234023), we get a palindrome (340832238043).

The spelling of 320432004020 in words is "three hundred twenty billion, four hundred thirty-two million, four thousand, twenty".