18055305 has 40 divisors (see below), whose sum is σ = 32742600. Its totient is φ = 9517824.

The previous prime is 18055291. The next prime is 18055327. The reversal of 18055305 is 50355081.

It can be written as a sum of positive squares in 4 ways, for example, as 6906384 + 11148921 = 2628^2 + 3339^2 .

It is not a de Polignac number, because 18055305 - 2⁸ = 18055049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43941 + ... + 44349.

It is an arithmetic number, because the mean of its divisors is an integer number (818565).

Almost surely, 2^18055305 is an apocalyptic number.

18055305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18055305 is a deficient number, since it is larger than the sum of its proper divisors (14687295).

18055305 is a wasteful number, since it uses less digits than its factorization.

18055305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 18055305 is about 4249.1534450994. The cubic root of 18055305 is about 262.3422725928.

The spelling of 18055305 in words is "eighteen million, fifty-five thousand, three hundred five".