20048945668949 has 2 divisors, whose sum is σ = 20048945668950. Its totient is φ = 20048945668948.

The previous prime is 20048945668931. The next prime is 20048945669021. The reversal of 20048945668949 is 94986654984002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14565939406225 + 5483006262724 = 3816535^2 + 2341582^2 .

It is a cyclic number.

It is not a de Polignac number, because 20048945668949 - 2⁸ = 20048945668693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20048945668249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10024472834474 + 10024472834475.

It is an arithmetic number, because the mean of its divisors is an integer number (10024472834475).

Almost surely, 2^{20048945668949} is an apocalyptic number.

It is an amenable number.

20048945668949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20048945668949 is an equidigital number, since it uses as much as digits as its factorization.

20048945668949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1074954240, while the sum is 74.

The spelling of 20048945668949 in words is "twenty trillion, forty-eight billion, nine hundred forty-five million, six hundred sixty-eight thousand, nine hundred forty-nine".