20600952623861 has 2 divisors, whose sum is σ = 20600952623862. Its totient is φ = 20600952623860.

The previous prime is 20600952623831. The next prime is 20600952623863. The reversal of 20600952623861 is 16832625900602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19823919188836 + 777033435025 = 4452406^2 + 881495^2 .

It is a cyclic number.

It is not a de Polignac number, because 20600952623861 - 2³⁸ = 20326074716917 is a prime.

Together with 20600952623863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20600952623863) 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, 10300476311930 + 10300476311931.

It is an arithmetic number, because the mean of its divisors is an integer number (10300476311931).

Almost surely, 2^{20600952623861} is an apocalyptic number.

It is an amenable number.

20600952623861 is a deficient number, since it is larger than the sum of its proper divisors (1).

20600952623861 is an equidigital number, since it uses as much as digits as its factorization.

20600952623861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 20600952623861 in words is "twenty trillion, six hundred billion, nine hundred fifty-two million, six hundred twenty-three thousand, eight hundred sixty-one".