20736189601 has 2 divisors, whose sum is σ = 20736189602. Its totient is φ = 20736189600.

The previous prime is 20736189583. The next prime is 20736189613. The reversal of 20736189601 is 10698163702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15326440000 + 5409749601 = 123800^2 + 73551^2 .

It is a cyclic number.

It is not a de Polignac number, because 20736189601 - 2²⁵ = 20702635169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20736189101) 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, 10368094800 + 10368094801.

It is an arithmetic number, because the mean of its divisors is an integer number (10368094801).

Almost surely, 2^20736189601 is an apocalyptic number.

It is an amenable number.

20736189601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20736189601 is an equidigital number, since it uses as much as digits as its factorization.

20736189601 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 43.

The spelling of 20736189601 in words is "twenty billion, seven hundred thirty-six million, one hundred eighty-nine thousand, six hundred one".