18411225 has 24 divisors (see below), whose sum is σ = 34789440. Its totient is φ = 8416320.

The previous prime is 18411199. The next prime is 18411229. The reversal of 18411225 is 52211481.

It is not a de Polignac number, because 18411225 - 2⁶ = 18411161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18411195 and 18411204.

It is not an unprimeable number, because it can be changed into a prime (18411229) 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, 17010 + ... + 18059.

It is an arithmetic number, because the mean of its divisors is an integer number (1449560).

Almost surely, 2^18411225 is an apocalyptic number.

18411225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18411225 is a deficient number, since it is larger than the sum of its proper divisors (16378215).

18411225 is a wasteful number, since it uses less digits than its factorization.

18411225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35089 (or 35084 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 18411225 is about 4290.8303392234. The cubic root of 18411225 is about 264.0548984775.

The spelling of 18411225 in words is "eighteen million, four hundred eleven thousand, two hundred twenty-five".