320533506442020 has 192 divisors, whose sum is σ = 962767950842880. Its totient is φ = 79431479142912.

The previous prime is 320533506442003. The next prime is 320533506442021. The reversal of 320533506442020 is 20244605335023.

It is a self number, because there is not a number n which added to its sum of digits gives 320533506442020.

It is not an unprimeable number, because it can be changed into a prime (320533506442021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 274146379 + ... + 275313101.

It is an arithmetic number, because the mean of its divisors is an integer number (5014416410640).

Almost surely, 2^{320533506442020} is an apocalyptic number.

320533506442020 is a gapful number since it is divisible by the number (30) 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 320533506442020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481383975421440).

320533506442020 is an abundant number, since it is smaller than the sum of its proper divisors (642234444400860).

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

320533506442020 is a wasteful number, since it uses less digits than its factorization.

320533506442020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171354 (or 1171352 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 39.

The spelling of 320533506442020 in words is "three hundred twenty trillion, five hundred thirty-three billion, five hundred six million, four hundred forty-two thousand, twenty".