18326385 has 128 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 7257600.

The previous prime is 18326351. The next prime is 18326387. The reversal of 18326385 is 58362381.

18326385 is a `hidden beast` number, since 18 + 3 + 2 + 638 + 5 = 666.

It is not a de Polignac number, because 18326385 - 2⁸ = 18326129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18326387) 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 in 127 ways as a sum of consecutive naturals, for example, 426174 + ... + 426216.

It is an arithmetic number, because the mean of its divisors is an integer number (332640).

Almost surely, 2^18326385 is an apocalyptic number.

18326385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18326385 is an abundant number, since it is smaller than the sum of its proper divisors (24251535).

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

18326385 is a wasteful number, since it uses less digits than its factorization.

18326385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 110 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18326385 is about 4280.9327254700. The cubic root of 18326385 is about 263.6486804140.

The spelling of 18326385 in words is "eighteen million, three hundred twenty-six thousand, three hundred eighty-five".