20109860297 has 2 divisors, whose sum is σ = 20109860298. Its totient is φ = 20109860296.

The previous prime is 20109860263. The next prime is 20109860327. The reversal of 20109860297 is 79206890102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11486694976 + 8623165321 = 107176^2 + 92861^2 .

It is a cyclic number.

It is not a de Polignac number, because 20109860297 - 2⁸ = 20109860041 is a prime.

It is not a weakly prime, because it can be changed into another prime (20109860257) 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, 10054930148 + 10054930149.

It is an arithmetic number, because the mean of its divisors is an integer number (10054930149).

Almost surely, 2^20109860297 is an apocalyptic number.

It is an amenable number.

20109860297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109860297 is an equidigital number, since it uses as much as digits as its factorization.

20109860297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 20109860297 in words is "twenty billion, one hundred nine million, eight hundred sixty thousand, two hundred ninety-seven".