18375808 has 64 divisors (see below), whose sum is σ = 41322240. Its totient is φ = 8064000.

The previous prime is 18375769. The next prime is 18375809. The reversal of 18375808 is 80857381.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (18375809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43438 + ... + 43858.

It is an arithmetic number, because the mean of its divisors is an integer number (645660).

Almost surely, 2^18375808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18375808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20661120).

18375808 is an abundant number, since it is smaller than the sum of its proper divisors (22946432).

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

18375808 is a wasteful number, since it uses less digits than its factorization.

18375808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 18375808 is about 4286.7012958684. The cubic root of 18375808 is about 263.8854722086.

The spelling of 18375808 in words is "eighteen million, three hundred seventy-five thousand, eight hundred eight".