18068544 has 168 divisors, whose sum is σ = 59171840. Its totient is φ = 5225472.

The previous prime is 18068527. The next prime is 18068549. The reversal of 18068544 is 44586081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18068499 and 18068508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18068549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142209 + ... + 142335.

Almost surely, 2^18068544 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 18068544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29585920).

18068544 is an abundant number, since it is smaller than the sum of its proper divisors (41103296).

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

18068544 is a wasteful number, since it uses less digits than its factorization.

18068544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 18068544 is about 4250.7109993506. The cubic root of 18068544 is about 262.4063774972.

The spelling of 18068544 in words is "eighteen million, sixty-eight thousand, five hundred forty-four".