20303554213 has 2 divisors, whose sum is σ = 20303554214. Its totient is φ = 20303554212.

The previous prime is 20303554181. The next prime is 20303554309. The reversal of 20303554213 is 31245530302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14300093889 + 6003460324 = 119583^2 + 77482^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303554213 - 2⁵ = 20303554181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303554913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151777106 + 10151777107.

It is an arithmetic number, because the mean of its divisors is an integer number (10151777107).

Almost surely, 2^20303554213 is an apocalyptic number.

It is an amenable number.

20303554213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303554213 is an equidigital number, since it uses as much as digits as its factorization.

20303554213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 20303554213 in words is "twenty billion, three hundred three million, five hundred fifty-four thousand, two hundred thirteen".