18006536 has 32 divisors (see below), whose sum is σ = 36910080. Its totient is φ = 8198400.

The previous prime is 18006497. The next prime is 18006557. The reversal of 18006536 is 63560081.

It is a junction number, because it is equal to n+sod(n) for n = 18006499 and 18006508.

It is a congruent number.

It is an unprimeable number.

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, 2081 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (1153440).

Almost surely, 2^18006536 is an apocalyptic number.

It is an amenable number.

18006536 is an abundant number, since it is smaller than the sum of its proper divisors (18903544).

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

18006536 is a wasteful number, since it uses less digits than its factorization.

18006536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325 (or 4321 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 18006536 is about 4243.4108921951. The cubic root of 18006536 is about 262.1058562596.

The spelling of 18006536 in words is "eighteen million, six thousand, five hundred thirty-six".