20200520513 has 2 divisors, whose sum is σ = 20200520514. Its totient is φ = 20200520512.

The previous prime is 20200520471. The next prime is 20200520551. The reversal of 20200520513 is 31502500202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16218531904 + 3981988609 = 127352^2 + 63103^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200520513 - 2⁸ = 20200520257 is a prime.

It is a super-2 number, since 2×20200520513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20200520573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100260256 + 10100260257.

It is an arithmetic number, because the mean of its divisors is an integer number (10100260257).

Almost surely, 2^20200520513 is an apocalyptic number.

It is an amenable number.

20200520513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200520513 is an equidigital number, since it uses as much as digits as its factorization.

20200520513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The spelling of 20200520513 in words is "twenty billion, two hundred million, five hundred twenty thousand, five hundred thirteen".