18225611 has 2 divisors, whose sum is σ = 18225612. Its totient is φ = 18225610.

The previous prime is 18225589. The next prime is 18225653. The reversal of 18225611 is 11652281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18225611 - 2¹⁸ = 17963467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18225661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9112805 + 9112806.

It is an arithmetic number, because the mean of its divisors is an integer number (9112806).

Almost surely, 2^18225611 is an apocalyptic number.

18225611 is a deficient number, since it is larger than the sum of its proper divisors (1).

18225611 is an equidigital number, since it uses as much as digits as its factorization.

18225611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 18225611 is about 4269.1464017998. The cubic root of 18225611 is about 263.1645372702.

Adding to 18225611 its reverse (11652281), we get a palindrome (29877892).

The spelling of 18225611 in words is "eighteen million, two hundred twenty-five thousand, six hundred eleven".