20301257 has 2 divisors, whose sum is σ = 20301258. Its totient is φ = 20301256.

The previous prime is 20301221. The next prime is 20301263. The reversal of 20301257 is 75210302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17673616 + 2627641 = 4204^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 20301257 - 2¹⁰ = 20300233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20301277) 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, 10150628 + 10150629.

It is an arithmetic number, because the mean of its divisors is an integer number (10150629).

Almost surely, 2^20301257 is an apocalyptic number.

It is an amenable number.

20301257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20301257 is an equidigital number, since it uses as much as digits as its factorization.

20301257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20301257 is about 4505.6916228255. The cubic root of 20301257 is about 272.7978708379.

Adding to 20301257 its reverse (75210302), we get a palindrome (95511559).

The spelling of 20301257 in words is "twenty million, three hundred one thousand, two hundred fifty-seven".