18008745 has 8 divisors (see below), whose sum is σ = 28814016. Its totient is φ = 9604656.

The previous prime is 18008693. The next prime is 18008777. The reversal of 18008745 is 54780081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18008745 - 2¹⁵ = 17975977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600277 + ... + 600306.

It is an arithmetic number, because the mean of its divisors is an integer number (3601752).

Almost surely, 2^18008745 is an apocalyptic number.

18008745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18008745 is a deficient number, since it is larger than the sum of its proper divisors (10805271).

18008745 is a wasteful number, since it uses less digits than its factorization.

18008745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200591.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18008745 is about 4243.6711701073. The cubic root of 18008745 is about 262.1165740005.

The spelling of 18008745 in words is "eighteen million, eight thousand, seven hundred forty-five".