20633622308477 has 2 divisors, whose sum is σ = 20633622308478. Its totient is φ = 20633622308476.

The previous prime is 20633622308389. The next prime is 20633622308513. The reversal of 20633622308477 is 77480322633602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20574760755481 + 58861552996 = 4535941^2 + 242614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20633622308477 - 2³⁸ = 20358744401533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20633622308777) 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, 10316811154238 + 10316811154239.

It is an arithmetic number, because the mean of its divisors is an integer number (10316811154239).

Almost surely, 2^{20633622308477} is an apocalyptic number.

It is an amenable number.

20633622308477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20633622308477 is an equidigital number, since it uses as much as digits as its factorization.

20633622308477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 53.

The spelling of 20633622308477 in words is "twenty trillion, six hundred thirty-three billion, six hundred twenty-two million, three hundred eight thousand, four hundred seventy-seven".