18055275 has 72 divisors (see below), whose sum is σ = 36894960. Its totient is φ = 7768320.

The previous prime is 18055259. The next prime is 18055283. The reversal of 18055275 is 57255081.

It is a happy number.

It is not a de Polignac number, because 18055275 - 2⁴ = 18055259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1062067 + ... + 1062083.

It is an arithmetic number, because the mean of its divisors is an integer number (512430).

Almost surely, 2^18055275 is an apocalyptic number.

18055275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18055275 is an abundant number, since it is smaller than the sum of its proper divisors (18839685).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18055275 is an equidigital number, since it uses as much as digits as its factorization.

18055275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 32 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 18055275 is about 4249.1499149830. The cubic root of 18055275 is about 262.3421272935.

It can be divided in two parts, 180 and 55275, that added together give a palindrome (55455).

The spelling of 18055275 in words is "eighteen million, fifty-five thousand, two hundred seventy-five".