20663135334223 has 2 divisors, whose sum is σ = 20663135334224. Its totient is φ = 20663135334222.

The previous prime is 20663135334209. The next prime is 20663135334277. The reversal of 20663135334223 is 32243353136602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20663135334223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20663135334223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20663135334823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10331567667111 + 10331567667112.

It is an arithmetic number, because the mean of its divisors is an integer number (10331567667112).

Almost surely, 2^{20663135334223} is an apocalyptic number.

20663135334223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20663135334223 is an equidigital number, since it uses as much as digits as its factorization.

20663135334223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 43.

The spelling of 20663135334223 in words is "twenty trillion, six hundred sixty-three billion, one hundred thirty-five million, three hundred thirty-four thousand, two hundred twenty-three".