20301997 has 2 divisors, whose sum is σ = 20301998. Its totient is φ = 20301996.

The previous prime is 20301991. The next prime is 20302019. The reversal of 20301997 is 79910302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15413476 + 4888521 = 3926^2 + 2211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20301997 - 2¹¹ = 20299949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20301991) 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, 10150998 + 10150999.

It is an arithmetic number, because the mean of its divisors is an integer number (10150999).

Almost surely, 2^20301997 is an apocalyptic number.

It is an amenable number.

20301997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20301997 is an equidigital number, since it uses as much as digits as its factorization.

20301997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 20301997 is about 4505.7737404357. The cubic root of 20301997 is about 272.8011853777.

The spelling of 20301997 in words is "twenty million, three hundred one thousand, nine hundred ninety-seven".