20013653450473 has 2 divisors, whose sum is σ = 20013653450474. Its totient is φ = 20013653450472.

The previous prime is 20013653450447. The next prime is 20013653450491. The reversal of 20013653450473 is 37405435631002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18140554643929 + 1873098806544 = 4259173^2 + 1368612^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013653450473 - 2⁹ = 20013653449961 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013653450423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006826725236 + 10006826725237.

It is an arithmetic number, because the mean of its divisors is an integer number (10006826725237).

Almost surely, 2^{20013653450473} is an apocalyptic number.

It is an amenable number.

20013653450473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013653450473 is an equidigital number, since it uses as much as digits as its factorization.

20013653450473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 20013653450473 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred fifty thousand, four hundred seventy-three".