20194476563 has 2 divisors, whose sum is σ = 20194476564. Its totient is φ = 20194476562.

The previous prime is 20194476541. The next prime is 20194476581. The reversal of 20194476563 is 36567449102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20194476563 is a prime.

It is not a weakly prime, because it can be changed into another prime (20194475563) 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, 10097238281 + 10097238282.

It is an arithmetic number, because the mean of its divisors is an integer number (10097238282).

Almost surely, 2^20194476563 is an apocalyptic number.

20194476563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194476563 is an equidigital number, since it uses as much as digits as its factorization.

20194476563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 20194476563 in words is "twenty billion, one hundred ninety-four million, four hundred seventy-six thousand, five hundred sixty-three".