18346009 has 24 divisors (see below), whose sum is σ = 22104000. Its totient is φ = 15079680.

The previous prime is 18345989. The next prime is 18346021. The reversal of 18346009 is 90064381.

It is not a de Polignac number, because 18346009 - 2¹⁵ = 18313241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18346049) 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, 92092 + ... + 92290.

It is an arithmetic number, because the mean of its divisors is an integer number (921000).

Almost surely, 2^18346009 is an apocalyptic number.

It is an amenable number.

18346009 is a deficient number, since it is larger than the sum of its proper divisors (3757991).

18346009 is a wasteful number, since it uses less digits than its factorization.

18346009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18346009 is about 4283.2241360919. The cubic root of 18346009 is about 263.7427523596.

The spelling of 18346009 in words is "eighteen million, three hundred forty-six thousand, nine".