320221300020 has 72 divisors (see below), whose sum is σ = 952464513504. Its totient is φ = 80369263104.

The previous prime is 320221299971. The next prime is 320221300031. The reversal of 320221300020 is 20003122023.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9216262 + ... + 9250941.

Almost surely, 2^320221300020 is an apocalyptic number.

320221300020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320221300020 is an abundant number, since it is smaller than the sum of its proper divisors (632243213484).

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

320221300020 is a wasteful number, since it uses less digits than its factorization.

320221300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18467249 (or 18467230 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 320221300020 its reverse (20003122023), we get a palindrome (340224422043).

The spelling of 320221300020 in words is "three hundred twenty billion, two hundred twenty-one million, three hundred thousand, twenty".