18236536345 has 8 divisors (see below), whose sum is σ = 21919315464. Its totient is φ = 14565581184.

The previous prime is 18236536343. The next prime is 18236536369. The reversal of 18236536345 is 54363563281.

It can be written as a sum of positive squares in 4 ways, for example, as 17205904 + 18219330441 = 4148^2 + 134979^2 .

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 18236536345 - 2¹ = 18236536343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18236536295 and 18236536304.

It is not an unprimeable number, because it can be changed into a prime (18236536343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2952594 + ... + 2958763.

It is an arithmetic number, because the mean of its divisors is an integer number (2739914433).

Almost surely, 2^18236536345 is an apocalyptic number.

It is an amenable number.

18236536345 is a deficient number, since it is larger than the sum of its proper divisors (3682779119).

18236536345 is an equidigital number, since it uses as much as digits as its factorization.

18236536345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911979.

The product of its digits is 1555200, while the sum is 46.

The spelling of 18236536345 in words is "eighteen billion, two hundred thirty-six million, five hundred thirty-six thousand, three hundred forty-five".