18116636 has 6 divisors (see below), whose sum is σ = 31704120. Its totient is φ = 9058316.

The previous prime is 18116597. The next prime is 18116653. The reversal of 18116636 is 63661181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2264576 + ... + 2264583.

It is an arithmetic number, because the mean of its divisors is an integer number (5284020).

Almost surely, 2^18116636 is an apocalyptic number.

It is an amenable number.

18116636 is a deficient number, since it is larger than the sum of its proper divisors (13587484).

18116636 is a wasteful number, since it uses less digits than its factorization.

18116636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529163 (or 4529161 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 18116636 is about 4256.3641761485. The cubic root of 18116636 is about 262.6389818824.

The spelling of 18116636 in words is "eighteen million, one hundred sixteen thousand, six hundred thirty-six".