20126287 has 2 divisors, whose sum is σ = 20126288. Its totient is φ = 20126286.

The previous prime is 20126251. The next prime is 20126291. The reversal of 20126287 is 78262102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20126287 - 2⁷ = 20126159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20126207) 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, 10063143 + 10063144.

It is an arithmetic number, because the mean of its divisors is an integer number (10063144).

Almost surely, 2^20126287 is an apocalyptic number.

20126287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126287 is an equidigital number, since it uses as much as digits as its factorization.

20126287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20126287 is about 4486.2330523503. The cubic root of 20126287 is about 272.0118894385.

Adding to 20126287 its reverse (78262102), we get a palindrome (98388389).

The spelling of 20126287 in words is "twenty million, one hundred twenty-six thousand, two hundred eighty-seven".