18099305 has 32 divisors (see below), whose sum is σ = 27682560. Its totient is φ = 11059200.

The previous prime is 18099299. The next prime is 18099311. The reversal of 18099305 is 50399081.

It is an interprime number because it is at equal distance from previous prime (18099299) and next prime (18099311).

It is not a de Polignac number, because 18099305 - 2⁶ = 18099241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10505 + ... + 12105.

It is an arithmetic number, because the mean of its divisors is an integer number (865080).

Almost surely, 2^18099305 is an apocalyptic number.

It is an amenable number.

18099305 is a deficient number, since it is larger than the sum of its proper divisors (9583255).

18099305 is a wasteful number, since it uses less digits than its factorization.

18099305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 18099305 is about 4254.3277964915. The cubic root of 18099305 is about 262.5552053204. Note that the first 3 decimals are identical.

The spelling of 18099305 in words is "eighteen million, ninety-nine thousand, three hundred five".