20320030320 has 80 divisors (see below), whose sum is σ = 66307482240. Its totient is φ = 5133480192.

The previous prime is 20320030273. The next prime is 20320030441. The reversal of 20320030320 is 2303002302.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a self number, because there is not a number n which added to its sum of digits gives 20320030320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2223514 + ... + 2232633.

It is an arithmetic number, because the mean of its divisors is an integer number (828843528).

Almost surely, 2^20320030320 is an apocalyptic number.

20320030320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320030320 is an abundant number, since it is smaller than the sum of its proper divisors (45987451920).

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

20320030320 is a wasteful number, since it uses less digits than its factorization.

20320030320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456182 (or 4456176 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

Adding to 20320030320 its reverse (2303002302), we get a palindrome (22623032622).

The spelling of 20320030320 in words is "twenty billion, three hundred twenty million, thirty thousand, three hundred twenty".