18329865559 has 2 divisors, whose sum is σ = 18329865560. Its totient is φ = 18329865558.

The previous prime is 18329865509. The next prime is 18329865563. The reversal of 18329865559 is 95556892381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18329865559 - 2¹³ = 18329857367 is a prime.

It is a super-2 number, since 2×18329865559² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18329865497 and 18329865506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18329865509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9164932779 + 9164932780.

It is an arithmetic number, because the mean of its divisors is an integer number (9164932780).

Almost surely, 2^18329865559 is an apocalyptic number.

18329865559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18329865559 is an equidigital number, since it uses as much as digits as its factorization.

18329865559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 61.

The spelling of 18329865559 in words is "eighteen billion, three hundred twenty-nine million, eight hundred sixty-five thousand, five hundred fifty-nine".