18068809 has 12 divisors (see below), whose sum is σ = 20205360. Its totient is φ = 16141400.

The previous prime is 18068803. The next prime is 18068819. The reversal of 18068809 is 90886081.

It is a happy number.

It is not a de Polignac number, because 18068809 - 2⁷ = 18068681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18068803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5874 + ... + 8404.

It is an arithmetic number, because the mean of its divisors is an integer number (1683780).

Almost surely, 2^18068809 is an apocalyptic number.

It is an amenable number.

18068809 is a deficient number, since it is larger than the sum of its proper divisors (2136551).

18068809 is a wasteful number, since it uses less digits than its factorization.

18068809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 2601 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 18068809 is about 4250.7421704921. The cubic root of 18068809 is about 262.4076603408.

The spelling of 18068809 in words is "eighteen million, sixty-eight thousand, eight hundred nine".