18006225 has 24 divisors (see below), whose sum is σ = 29893920. Its totient is φ = 9563520.

The previous prime is 18006221. The next prime is 18006227. The reversal of 18006225 is 52260081.

It is not a de Polignac number, because 18006225 - 2² = 18006221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18006195 and 18006204.

It is not an unprimeable number, because it can be changed into a prime (18006221) 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, 30382 + ... + 30968.

It is an arithmetic number, because the mean of its divisors is an integer number (1245580).

Almost surely, 2^18006225 is an apocalyptic number.

18006225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18006225 is a deficient number, since it is larger than the sum of its proper divisors (11887695).

18006225 is a wasteful number, since it uses less digits than its factorization.

18006225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18006225 is about 4243.3742469879. The cubic root of 18006225 is about 262.1043472633.

The spelling of 18006225 in words is "eighteen million, six thousand, two hundred twenty-five".