18009069 has 32 divisors (see below), whose sum is σ = 28594944. Its totient is φ = 9968640.

The previous prime is 18009059. The next prime is 18009073. The reversal of 18009069 is 96090081.

It is a happy number.

It is not a de Polignac number, because 18009069 - 2¹¹ = 18007021 is a prime.

It is a super-2 number, since 2×18009069² = 648653132493522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14659 + ... + 15839.

It is an arithmetic number, because the mean of its divisors is an integer number (893592).

Almost surely, 2^18009069 is an apocalyptic number.

It is an amenable number.

18009069 is a deficient number, since it is larger than the sum of its proper divisors (10585875).

18009069 is a wasteful number, since it uses less digits than its factorization.

18009069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 18009069 is about 4243.7093444297. The cubic root of 18009069 is about 262.1181459268.

The spelling of 18009069 in words is "eighteen million, nine thousand, sixty-nine".