20424811663 has 2 divisors, whose sum is σ = 20424811664. Its totient is φ = 20424811662.

The previous prime is 20424811651. The next prime is 20424811681. The reversal of 20424811663 is 36611842402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20424811663 - 2²¹ = 20422714511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424818663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212405831 + 10212405832.

It is an arithmetic number, because the mean of its divisors is an integer number (10212405832).

Almost surely, 2^20424811663 is an apocalyptic number.

20424811663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424811663 is an equidigital number, since it uses as much as digits as its factorization.

20424811663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 20424811663 in words is "twenty billion, four hundred twenty-four million, eight hundred eleven thousand, six hundred sixty-three".