20396036018009 has 2 divisors, whose sum is σ = 20396036018010. Its totient is φ = 20396036018008.

The previous prime is 20396036017999. The next prime is 20396036018021. The reversal of 20396036018009 is 90081063069302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19780434150400 + 615601867609 = 4447520^2 + 784603^2 .

It is a cyclic number.

It is not a de Polignac number, because 20396036018009 - 2³² = 20391741050713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20396036014009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198018009004 + 10198018009005.

It is an arithmetic number, because the mean of its divisors is an integer number (10198018009005).

Almost surely, 2^{20396036018009} is an apocalyptic number.

It is an amenable number.

20396036018009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20396036018009 is an equidigital number, since it uses as much as digits as its factorization.

20396036018009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 20396036018009 in words is "twenty trillion, three hundred ninety-six billion, thirty-six million, eighteen thousand, nine".