18068409 has 24 divisors (see below), whose sum is σ = 27436032. Its totient is φ = 11436480.

The previous prime is 18068377. The next prime is 18068419. The reversal of 18068409 is 90486081.

It is a happy number.

It is not a de Polignac number, because 18068409 - 2⁵ = 18068377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18068419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39309 + ... + 39765.

It is an arithmetic number, because the mean of its divisors is an integer number (1143168).

Almost surely, 2^18068409 is an apocalyptic number.

It is an amenable number.

18068409 is a deficient number, since it is larger than the sum of its proper divisors (9367623).

18068409 is a wasteful number, since it uses less digits than its factorization.

18068409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18068409 is about 4250.6951196246. The cubic root of 18068409 is about 262.4057239682.

The spelling of 18068409 in words is "eighteen million, sixty-eight thousand, four hundred nine".