20048945669021 has 2 divisors, whose sum is σ = 20048945669022. Its totient is φ = 20048945669020.

The previous prime is 20048945668949. The next prime is 20048945669033. The reversal of 20048945669021 is 12096654984002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12641082484900 + 7407863184121 = 3555430^2 + 2721739^2 .

It is a cyclic number.

It is not a de Polignac number, because 20048945669021 - 2¹⁰ = 20048945667997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20048945660021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10024472834510 + 10024472834511.

It is an arithmetic number, because the mean of its divisors is an integer number (10024472834511).

Almost surely, 2^{20048945669021} is an apocalyptic number.

It is an amenable number.

20048945669021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20048945669021 is an equidigital number, since it uses as much as digits as its factorization.

20048945669021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 20048945669021 in words is "twenty trillion, forty-eight billion, nine hundred forty-five million, six hundred sixty-nine thousand, twenty-one".