18006336 has 84 divisors (see below), whose sum is σ = 52884832. Its totient is φ = 5854464.

The previous prime is 18006323. The next prime is 18006337. The reversal of 18006336 is 63360081.

It is a super-2 number, since 2×18006336² = 648456272289792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006337) 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 11 ways as a sum of consecutive naturals, for example, 24405 + ... + 25131.

Almost surely, 2^18006336 is an apocalyptic number.

18006336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18006336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26442416).

18006336 is an abundant number, since it is smaller than the sum of its proper divisors (34878496).

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

18006336 is a wasteful number, since it uses less digits than its factorization.

18006336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 18006336 is about 4243.3873261818. The cubic root of 18006336 is about 262.1048858459.

The spelling of 18006336 in words is "eighteen million, six thousand, three hundred thirty-six".