20323220320 has 48 divisors (see below), whose sum is σ = 51706967760. Its totient is φ = 7503957504.

The previous prime is 20323220273. The next prime is 20323220347. The reversal of 20323220320 is 2302232302.

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, 4883310 + ... + 4887469.

It is an arithmetic number, because the mean of its divisors is an integer number (1077228495).

Almost surely, 2^20323220320 is an apocalyptic number.

20323220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323220320 is an abundant number, since it is smaller than the sum of its proper divisors (31383747440).

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

20323220320 is a wasteful number, since it uses less digits than its factorization.

20323220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9770807 (or 9770799 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

Adding to 20323220320 its reverse (2302232302), we get a palindrome (22625452622).

The spelling of 20323220320 in words is "twenty billion, three hundred twenty-three million, two hundred twenty thousand, three hundred twenty".