20417616823 has 2 divisors, whose sum is σ = 20417616824. Its totient is φ = 20417616822.

The previous prime is 20417616799. The next prime is 20417616827. The reversal of 20417616823 is 32861671402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20417616823 - 2⁹ = 20417616311 is a prime.

It is a super-2 number, since 2×20417616823² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20417616827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10208808411 + 10208808412.

It is an arithmetic number, because the mean of its divisors is an integer number (10208808412).

Almost surely, 2^20417616823 is an apocalyptic number.

20417616823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20417616823 is an equidigital number, since it uses as much as digits as its factorization.

20417616823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 20417616823 in words is "twenty billion, four hundred seventeen million, six hundred sixteen thousand, eight hundred twenty-three".