18559740505 has 8 divisors (see below), whose sum is σ = 22276284552. Its totient is φ = 14844728448.

The previous prime is 18559740491. The next prime is 18559740527. The reversal of 18559740505 is 50504795581.

It can be written as a sum of positive squares in 4 ways, for example, as 5366002009 + 13193738496 = 73253^2 + 114864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18559740505 - 2⁷ = 18559740377 is a prime.

It is a super-2 number, since 2×18559740505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356172 + ... + 404941.

It is an arithmetic number, because the mean of its divisors is an integer number (2784535569).

Almost surely, 2^18559740505 is an apocalyptic number.

It is an amenable number.

18559740505 is a deficient number, since it is larger than the sum of its proper divisors (3716544047).

18559740505 is an equidigital number, since it uses as much as digits as its factorization.

18559740505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765995.

The product of its (nonzero) digits is 1260000, while the sum is 49.

The spelling of 18559740505 in words is "eighteen billion, five hundred fifty-nine million, seven hundred forty thousand, five hundred five".