18696009 has 8 divisors (see below), whose sum is σ = 25175232. Its totient is φ = 12340400.

The previous prime is 18695977. The next prime is 18696011. The reversal of 18696009 is 90069681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18696009 - 2⁵ = 18695977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18696049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30549 + ... + 31154.

It is an arithmetic number, because the mean of its divisors is an integer number (3146904).

Almost surely, 2^18696009 is an apocalyptic number.

It is an amenable number.

18696009 is a deficient number, since it is larger than the sum of its proper divisors (6479223).

18696009 is a wasteful number, since it uses less digits than its factorization.

18696009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61807.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 18696009 is about 4323.8881807928. Note that the first 3 decimals coincide. The cubic root of 18696009 is about 265.4094015982.

The spelling of 18696009 in words is "eighteen million, six hundred ninety-six thousand, nine".