18805436 has 12 divisors (see below), whose sum is σ = 35441112. Its totient is φ = 8679408.

The previous prime is 18805403. The next prime is 18805441. The reversal of 18805436 is 63450881.

It is a junction number, because it is equal to n+sod(n) for n = 18805396 and 18805405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180770 + ... + 180873.

It is an arithmetic number, because the mean of its divisors is an integer number (2953426).

Almost surely, 2^18805436 is an apocalyptic number.

It is an amenable number.

18805436 is a deficient number, since it is larger than the sum of its proper divisors (16635676).

18805436 is a wasteful number, since it uses less digits than its factorization.

18805436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361660 (or 361658 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 18805436 is about 4336.5234923842. The cubic root of 18805436 is about 265.9262048670.

The spelling of 18805436 in words is "eighteen million, eight hundred five thousand, four hundred thirty-six".