18236034505 has 16 divisors (see below), whose sum is σ = 23579804304. Its totient is φ = 13459046400.

The previous prime is 18236034493. The next prime is 18236034539. The reversal of 18236034505 is 50543063281.

It can be written as a sum of positive squares in 8 ways, for example, as 4352832576 + 13883201929 = 65976^2 + 117827^2 .

It is not a de Polignac number, because 18236034505 - 2⁹ = 18236033993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39177 + ... + 194953.

It is an arithmetic number, because the mean of its divisors is an integer number (1473737769).

Almost surely, 2^18236034505 is an apocalyptic number.

It is an amenable number.

18236034505 is a deficient number, since it is larger than the sum of its proper divisors (5343769799).

18236034505 is a wasteful number, since it uses less digits than its factorization.

18236034505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157596.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 18236034505 its reverse (50543063281), we get a palindrome (68779097786).

The spelling of 18236034505 in words is "eighteen billion, two hundred thirty-six million, thirty-four thousand, five hundred five".