20126497 has 2 divisors, whose sum is σ = 20126498. Its totient is φ = 20126496.

The previous prime is 20126489. The next prime is 20126503. The reversal of 20126497 is 79462102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 5716881 = 3796^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 20126497 - 2³ = 20126489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20126417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063248 + 10063249.

It is an arithmetic number, because the mean of its divisors is an integer number (10063249).

Almost surely, 2^20126497 is an apocalyptic number.

It is an amenable number.

20126497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126497 is an equidigital number, since it uses as much as digits as its factorization.

20126497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20126497 is about 4486.2564572258. The cubic root of 20126497 is about 272.0128355030.

Adding to 20126497 its reverse (79462102), we get a palindrome (99588599).

The spelling of 20126497 in words is "twenty million, one hundred twenty-six thousand, four hundred ninety-seven".