20030305320 has 192 divisors, whose sum is σ = 70445531520. Its totient is φ = 5109122304.

The previous prime is 20030305319. The next prime is 20030305387. The reversal of 20030305320 is 2350303002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20030305293 and 20030305302.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178762 + ... + 268358.

It is an arithmetic number, because the mean of its divisors is an integer number (366903810).

Almost surely, 2^20030305320 is an apocalyptic number.

20030305320 is a gapful number since it is divisible by the number (20) 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 20030305320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35222765760).

20030305320 is an abundant number, since it is smaller than the sum of its proper divisors (50415226200).

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

20030305320 is a wasteful number, since it uses less digits than its factorization.

20030305320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89646 (or 89630 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

Adding to 20030305320 its reverse (2350303002), we get a palindrome (22380608322).

The spelling of 20030305320 in words is "twenty billion, thirty million, three hundred five thousand, three hundred twenty".