18198435329 has 2 divisors, whose sum is σ = 18198435330. Its totient is φ = 18198435328.

The previous prime is 18198435317. The next prime is 18198435371. The reversal of 18198435329 is 92353489181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11886450625 + 6311984704 = 109025^2 + 79448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18198435329 is a prime.

It is not a weakly prime, because it can be changed into another prime (18198435379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9099217664 + 9099217665.

It is an arithmetic number, because the mean of its divisors is an integer number (9099217665).

Almost surely, 2^18198435329 is an apocalyptic number.

It is an amenable number.

18198435329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18198435329 is an equidigital number, since it uses as much as digits as its factorization.

18198435329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The spelling of 18198435329 in words is "eighteen billion, one hundred ninety-eight million, four hundred thirty-five thousand, three hundred twenty-nine".