20533840097 has 2 divisors, whose sum is σ = 20533840098. Its totient is φ = 20533840096.

The previous prime is 20533840051. The next prime is 20533840153. The reversal of 20533840097 is 79004833502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17188258816 + 3345581281 = 131104^2 + 57841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20533840097 - 2⁸ = 20533839841 is a prime.

It is not a weakly prime, because it can be changed into another prime (20533840007) 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, 10266920048 + 10266920049.

It is an arithmetic number, because the mean of its divisors is an integer number (10266920049).

Almost surely, 2^20533840097 is an apocalyptic number.

It is an amenable number.

20533840097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533840097 is an equidigital number, since it uses as much as digits as its factorization.

20533840097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20533840097 in words is "twenty billion, five hundred thirty-three million, eight hundred forty thousand, ninety-seven".