20536555151197 has 2 divisors, whose sum is σ = 20536555151198. Its totient is φ = 20536555151196.

The previous prime is 20536555151183. The next prime is 20536555151243. The reversal of 20536555151197 is 79115155563502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14837549618116 + 5699005533081 = 3851954^2 + 2387259^2 .

It is a cyclic number.

It is not a de Polignac number, because 20536555151197 - 2⁷ = 20536555151069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20536555151297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268277575598 + 10268277575599.

It is an arithmetic number, because the mean of its divisors is an integer number (10268277575599).

Almost surely, 2^{20536555151197} is an apocalyptic number.

It is an amenable number.

20536555151197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536555151197 is an equidigital number, since it uses as much as digits as its factorization.

20536555151197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7087500, while the sum is 55.

The spelling of 20536555151197 in words is "twenty trillion, five hundred thirty-six billion, five hundred fifty-five million, one hundred fifty-one thousand, one hundred ninety-seven".