14188821817 has 2 divisors, whose sum is σ = 14188821818. Its totient is φ = 14188821816.

The previous prime is 14188821727. The next prime is 14188821839. The reversal of 14188821817 is 71812888141.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14185762816 + 3059001 = 119104^2 + 1749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14188821817 is a prime.

It is not a weakly prime, because it can be changed into another prime (14188824817) 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, 7094410908 + 7094410909.

It is an arithmetic number, because the mean of its divisors is an integer number (7094410909).

Almost surely, 2^14188821817 is an apocalyptic number.

It is an amenable number.

14188821817 is a deficient number, since it is larger than the sum of its proper divisors (1).

14188821817 is an equidigital number, since it uses as much as digits as its factorization.

14188821817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 229376, while the sum is 49.

The spelling of 14188821817 in words is "fourteen billion, one hundred eighty-eight million, eight hundred twenty-one thousand, eight hundred seventeen".