18698965819 has 2 divisors, whose sum is σ = 18698965820. Its totient is φ = 18698965818.

The previous prime is 18698965793. The next prime is 18698965867. The reversal of 18698965819 is 91856989681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18698965819 - 2⁵ = 18698965787 is a prime.

It is a super-2 number, since 2×18698965819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18698965319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9349482909 + 9349482910.

It is an arithmetic number, because the mean of its divisors is an integer number (9349482910).

Almost surely, 2^18698965819 is an apocalyptic number.

18698965819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18698965819 is an equidigital number, since it uses as much as digits as its factorization.

18698965819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 70.

The spelling of 18698965819 in words is "eighteen billion, six hundred ninety-eight million, nine hundred sixty-five thousand, eight hundred nineteen".