18055306 has 4 divisors (see below), whose sum is σ = 27082962. Its totient is φ = 9027652.

The previous prime is 18055291. The next prime is 18055327. The reversal of 18055306 is 60355081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60355081 = 263 ⋅229487.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 4060225 = 3741^2 + 2015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4513825 + ... + 4513828.

Almost surely, 2^18055306 is an apocalyptic number.

18055306 is a deficient number, since it is larger than the sum of its proper divisors (9027656).

18055306 is an equidigital number, since it uses as much as digits as its factorization.

18055306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9027655.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 18055306 is about 4249.1535627699. The cubic root of 18055306 is about 262.3422774361.

The spelling of 18055306 in words is "eighteen million, fifty-five thousand, three hundred six".