20203220313 has 20 divisors (see below), whose sum is σ = 30674882788. Its totient is φ = 13248010080.

The previous prime is 20203220299. The next prime is 20203220341. The reversal of 20203220313 is 31302230202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3759774489 + 16443445824 = 61317^2 + 128232^2 .

It is not a de Polignac number, because 20203220313 - 2⁵ = 20203220281 is a prime.

It is a super-2 number, since 2×20203220313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203220383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2039506 + ... + 2049387.

Almost surely, 2^20203220313 is an apocalyptic number.

It is an amenable number.

20203220313 is a deficient number, since it is larger than the sum of its proper divisors (10471662475).

20203220313 is an equidigital number, since it uses as much as digits as its factorization.

20203220313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088966 (or 4088957 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20203220313 its reverse (31302230202), we get a palindrome (51505450515).

The spelling of 20203220313 in words is "twenty billion, two hundred three million, two hundred twenty thousand, three hundred thirteen".