18025823 has 2 divisors, whose sum is σ = 18025824. Its totient is φ = 18025822.

The previous prime is 18025789. The next prime is 18025841. The reversal of 18025823 is 32852081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18025823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18025853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012911 + 9012912.

It is an arithmetic number, because the mean of its divisors is an integer number (9012912).

Almost surely, 2^18025823 is an apocalyptic number.

18025823 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025823 is an equidigital number, since it uses as much as digits as its factorization.

18025823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18025823 is about 4245.6828661595. The cubic root of 18025823 is about 262.1994043619.

The spelling of 18025823 in words is "eighteen million, twenty-five thousand, eight hundred twenty-three".