18205570084 has 12 divisors (see below), whose sum is σ = 34310497564. Its totient is φ = 8402570784.

The previous prime is 18205570049. The next prime is 18205570087. The reversal of 18205570084 is 48007550281.

It can be written as a sum of positive squares in 2 ways, for example, as 2699841600 + 15505728484 = 51960^2 + 124522^2 .

It is not an unprimeable number, because it can be changed into a prime (18205570087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175053507 + ... + 175053610.

Almost surely, 2^18205570084 is an apocalyptic number.

It is an amenable number.

18205570084 is a deficient number, since it is larger than the sum of its proper divisors (16104927480).

18205570084 is a wasteful number, since it uses less digits than its factorization.

18205570084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350107134 (or 350107132 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

It can be divided in two parts, 18205 and 570084, that added together give a square (588289 = 767²).

The spelling of 18205570084 in words is "eighteen billion, two hundred five million, five hundred seventy thousand, eighty-four".