18039308897 has 2 divisors, whose sum is σ = 18039308898. Its totient is φ = 18039308896.

The previous prime is 18039308869. The next prime is 18039308951. The reversal of 18039308897 is 79880393081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13871186176 + 4168122721 = 117776^2 + 64561^2 .

It is a cyclic number.

It is not a de Polignac number, because 18039308897 - 2¹⁰ = 18039307873 is a prime.

It is a super-3 number, since 3×18039308897³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18039508897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019654448 + 9019654449.

It is an arithmetic number, because the mean of its divisors is an integer number (9019654449).

Almost surely, 2^18039308897 is an apocalyptic number.

It is an amenable number.

18039308897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18039308897 is an equidigital number, since it uses as much as digits as its factorization.

18039308897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 18039308897 in words is "eighteen billion, thirty-nine million, three hundred eight thousand, eight hundred ninety-seven".