18009835260959 has 4 divisors (see below), whose sum is σ = 18315086706120. Its totient is φ = 17704583815800.

The previous prime is 18009835260889. The next prime is 18009835260997. The reversal of 18009835260959 is 95906253890081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18009835260959 - 2³⁶ = 17941115784223 is a prime.

It is a super-2 number, since 2×18009835260959² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18009835260895 and 18009835260904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009835265959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152625722492 + ... + 152625722609.

It is an arithmetic number, because the mean of its divisors is an integer number (4578771676530).

Almost surely, 2^{18009835260959} is an apocalyptic number.

18009835260959 is a deficient number, since it is larger than the sum of its proper divisors (305251445161).

18009835260959 is an equidigital number, since it uses as much as digits as its factorization.

18009835260959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305251445160.

The product of its (nonzero) digits is 41990400, while the sum is 65.

The spelling of 18009835260959 in words is "eighteen trillion, nine billion, eight hundred thirty-five million, two hundred sixty thousand, nine hundred fifty-nine".