20202000257 has 2 divisors, whose sum is σ = 20202000258. Its totient is φ = 20202000256.

The previous prime is 20202000229. The next prime is 20202000281. The reversal of 20202000257 is 75200020202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15358397041 + 4843603216 = 123929^2 + 69596^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202000257 - 2¹² = 20201996161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20202000157) 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, 10101000128 + 10101000129.

It is an arithmetic number, because the mean of its divisors is an integer number (10101000129).

Almost surely, 2^20202000257 is an apocalyptic number.

It is an amenable number.

20202000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202000257 is an equidigital number, since it uses as much as digits as its factorization.

20202000257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 20.

Adding to 20202000257 its reverse (75200020202), we get a palindrome (95402020459).

The spelling of 20202000257 in words is "twenty billion, two hundred two million, two hundred fifty-seven", and thus it is an aban number.