18232806805 has 12 divisors (see below), whose sum is σ = 22426037316. Its totient is φ = 14230476800.

The previous prime is 18232806803. The next prime is 18232806841. The reversal of 18232806805 is 50860823281.

It can be written as a sum of positive squares in 6 ways, for example, as 4361149521 + 13871657284 = 66039^2 + 117778^2 .

It is not a de Polignac number, because 18232806805 - 2¹ = 18232806803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232806803) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1076236 + ... + 1093045.

It is an arithmetic number, because the mean of its divisors is an integer number (1868836443).

Almost surely, 2^18232806805 is an apocalyptic number.

It is an amenable number.

18232806805 is a deficient number, since it is larger than the sum of its proper divisors (4193230511).

18232806805 is an equidigital number, since it uses as much as digits as its factorization.

18232806805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169368 (or 2169327 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 18232806805 in words is "eighteen billion, two hundred thirty-two million, eight hundred six thousand, eight hundred five".