20003120320 has 28 divisors (see below), whose sum is σ = 47632431024. Its totient is φ = 8001248000.

The previous prime is 20003120317. The next prime is 20003120351. The reversal of 20003120320 is 2302130002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20003120320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31254556 + ... + 31255195.

Almost surely, 2^20003120320 is an apocalyptic number.

20003120320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003120320 is an abundant number, since it is smaller than the sum of its proper divisors (27629310704).

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

20003120320 is an equidigital number, since it uses as much as digits as its factorization.

20003120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62509768 (or 62509758 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20003120320 its reverse (2302130002), we get a palindrome (22305250322).

The spelling of 20003120320 in words is "twenty billion, three million, one hundred twenty thousand, three hundred twenty".