18368536705 has 4 divisors (see below), whose sum is σ = 22042244052. Its totient is φ = 14694829360.

The previous prime is 18368536699. The next prime is 18368536723. The reversal of 18368536705 is 50763586381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50763586381 = 761 ⋅66706421.

It can be written as a sum of positive squares in 2 ways, for example, as 3414181761 + 14954354944 = 58431^2 + 122288^2 .

It is not a de Polignac number, because 18368536705 - 2⁵ = 18368536673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1836853666 + ... + 1836853675.

It is an arithmetic number, because the mean of its divisors is an integer number (5510561013).

Almost surely, 2^18368536705 is an apocalyptic number.

It is an amenable number.

18368536705 is a deficient number, since it is larger than the sum of its proper divisors (3673707347).

18368536705 is an equidigital number, since it uses as much as digits as its factorization.

18368536705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673707346.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 18368536705 in words is "eighteen billion, three hundred sixty-eight million, five hundred thirty-six thousand, seven hundred five".