20262257 has 2 divisors, whose sum is σ = 20262258. Its totient is φ = 20262256.

The previous prime is 20262239. The next prime is 20262293. The reversal of 20262257 is 75226202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13830961 + 6431296 = 3719^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 20262257 - 2¹⁶ = 20196721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20262457) 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, 10131128 + 10131129.

It is an arithmetic number, because the mean of its divisors is an integer number (10131129).

Almost surely, 2^20262257 is an apocalyptic number.

It is an amenable number.

20262257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20262257 is an equidigital number, since it uses as much as digits as its factorization.

20262257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20262257 is about 4501.3616828689. The cubic root of 20262257 is about 272.6230715295.

Adding to 20262257 its reverse (75226202), we get a palindrome (95488459).

The spelling of 20262257 in words is "twenty million, two hundred sixty-two thousand, two hundred fifty-seven".