20013653450447 has 2 divisors, whose sum is σ = 20013653450448. Its totient is φ = 20013653450446.

The previous prime is 20013653450423. The next prime is 20013653450473. The reversal of 20013653450447 is 74405435631002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013653450447 - 2¹⁴ = 20013653434063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013653450398 and 20013653450407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013653452447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006826725223 + 10006826725224.

It is an arithmetic number, because the mean of its divisors is an integer number (10006826725224).

Almost surely, 2^{20013653450447} is an apocalyptic number.

20013653450447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013653450447 is an equidigital number, since it uses as much as digits as its factorization.

20013653450447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 20013653450447 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred fifty thousand, four hundred forty-seven".