20366835197 has 2 divisors, whose sum is σ = 20366835198. Its totient is φ = 20366835196.

The previous prime is 20366835163. The next prime is 20366835211. The reversal of 20366835197 is 79153866302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19179757081 + 1187078116 = 138491^2 + 34454^2 .

It is a cyclic number.

It is not a de Polignac number, because 20366835197 - 2³² = 16071867901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20366835107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183417598 + 10183417599.

It is an arithmetic number, because the mean of its divisors is an integer number (10183417599).

Almost surely, 2^20366835197 is an apocalyptic number.

It is an amenable number.

20366835197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20366835197 is an equidigital number, since it uses as much as digits as its factorization.

20366835197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 20366835197 in words is "twenty billion, three hundred sixty-six million, eight hundred thirty-five thousand, one hundred ninety-seven".