18080236 has 6 divisors (see below), whose sum is σ = 31640420. Its totient is φ = 9040116.

The previous prime is 18080233. The next prime is 18080243. The reversal of 18080236 is 63208081.

It is not an unprimeable number, because it can be changed into a prime (18080233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260026 + ... + 2260033.

Almost surely, 2^18080236 is an apocalyptic number.

It is an amenable number.

18080236 is a deficient number, since it is larger than the sum of its proper divisors (13560184).

18080236 is a wasteful number, since it uses less digits than its factorization.

18080236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520063 (or 4520061 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18080236 is about 4252.0860762689. The cubic root of 18080236 is about 262.4629655992.

The spelling of 18080236 in words is "eighteen million, eighty thousand, two hundred thirty-six".