20500097 has 2 divisors, whose sum is σ = 20500098. Its totient is φ = 20500096.

The previous prime is 20500091. The next prime is 20500159. The reversal of 20500097 is 79000502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18054001 + 2446096 = 4249^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 20500097 - 2⁶ = 20500033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20500091) 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, 10250048 + 10250049.

It is an arithmetic number, because the mean of its divisors is an integer number (10250049).

Almost surely, 2^20500097 is an apocalyptic number.

It is an amenable number.

20500097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500097 is an equidigital number, since it uses as much as digits as its factorization.

20500097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 20500097 is about 4527.7032809141. The cubic root of 20500097 is about 273.6856154053.

Adding to 20500097 its reverse (79000502), we get a palindrome (99500599).

The spelling of 20500097 in words is "twenty million, five hundred thousand, ninety-seven".