20203320320 has 88 divisors (see below), whose sum is σ = 48647773800. Its totient is φ = 8050737152.

The previous prime is 20203320307. The next prime is 20203320329. The reversal of 20203320320 is 2302330202.

It can be written as a sum of positive squares in 4 ways, for example, as 351637504 + 19851682816 = 18752^2 + 140896^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203320329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369946 + ... + 1384614.

Almost surely, 2^20203320320 is an apocalyptic number.

20203320320 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 20203320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24323886900).

20203320320 is an abundant number, since it is smaller than the sum of its proper divisors (28444453480).

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

20203320320 is a wasteful number, since it uses less digits than its factorization.

20203320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14963 (or 14945 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

Adding to 20203320320 its reverse (2302330202), we get a palindrome (22505650522).

The spelling of 20203320320 in words is "twenty billion, two hundred three million, three hundred twenty thousand, three hundred twenty".