20563102667 has 2 divisors, whose sum is σ = 20563102668. Its totient is φ = 20563102666.

The previous prime is 20563102639. The next prime is 20563102699. The reversal of 20563102667 is 76620136502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20563102667 - 2⁸ = 20563102411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20563102667.

It is not a weakly prime, because it can be changed into another prime (20563162667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281551333 + 10281551334.

It is an arithmetic number, because the mean of its divisors is an integer number (10281551334).

Almost surely, 2^20563102667 is an apocalyptic number.

20563102667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563102667 is an equidigital number, since it uses as much as digits as its factorization.

20563102667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 20563102667 in words is "twenty billion, five hundred sixty-three million, one hundred two thousand, six hundred sixty-seven".