20202930521 has 2 divisors, whose sum is σ = 20202930522. Its totient is φ = 20202930520.

The previous prime is 20202930487. The next prime is 20202930541. The reversal of 20202930521 is 12503920202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16537960000 + 3664970521 = 128600^2 + 60539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202930521 - 2³⁰ = 19129188697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20202930541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101465260 + 10101465261.

It is an arithmetic number, because the mean of its divisors is an integer number (10101465261).

Almost surely, 2^20202930521 is an apocalyptic number.

It is an amenable number.

20202930521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202930521 is an equidigital number, since it uses as much as digits as its factorization.

20202930521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 20202930521 in words is "twenty billion, two hundred two million, nine hundred thirty thousand, five hundred twenty-one".