20211330320 has 40 divisors (see below), whose sum is σ = 47108603160. Its totient is φ = 8064358400.

The previous prime is 20211330317. The next prime is 20211330343. The reversal of 20211330320 is 2303311202.

It can be written as a sum of positive squares in 4 ways, for example, as 13563863296 + 6647467024 = 116464^2 + 81532^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 282935 + ... + 347094.

It is an arithmetic number, because the mean of its divisors is an integer number (1177715079).

Almost surely, 2^20211330320 is an apocalyptic number.

20211330320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211330320 is an abundant number, since it is smaller than the sum of its proper divisors (26897272840).

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

20211330320 is a wasteful number, since it uses less digits than its factorization.

20211330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630443 (or 630437 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20211330320 its reverse (2303311202), we get a palindrome (22514641522).

The spelling of 20211330320 in words is "twenty billion, two hundred eleven million, three hundred thirty thousand, three hundred twenty".