18073636 has 48 divisors (see below), whose sum is σ = 38828160. Its totient is φ = 7188480.

The previous prime is 18073619. The next prime is 18073637. The reversal of 18073636 is 63637081.

It is not an unprimeable number, because it can be changed into a prime (18073637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27876 + ... + 28516.

It is an arithmetic number, because the mean of its divisors is an integer number (808920).

Almost surely, 2^18073636 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 18073636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19414080).

18073636 is an abundant number, since it is smaller than the sum of its proper divisors (20754524).

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

18073636 is a wasteful number, since it uses less digits than its factorization.

18073636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 18073636 is about 4251.3099157789. The cubic root of 18073636 is about 262.4310252640.

The spelling of 18073636 in words is "eighteen million, seventy-three thousand, six hundred thirty-six".