20938297 has 2 divisors, whose sum is σ = 20938298. Its totient is φ = 20938296.

The previous prime is 20938289. The next prime is 20938367. The reversal of 20938297 is 79283902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16168441 + 4769856 = 4021^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 20938297 - 2³ = 20938289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20938207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10469148 + 10469149.

It is an arithmetic number, because the mean of its divisors is an integer number (10469149).

Almost surely, 2^20938297 is an apocalyptic number.

It is an amenable number.

20938297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20938297 is an equidigital number, since it uses as much as digits as its factorization.

20938297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20938297 is about 4575.8383931254. The cubic root of 20938297 is about 275.6219400184.

The spelling of 20938297 in words is "twenty million, nine hundred thirty-eight thousand, two hundred ninety-seven".