18327540 has 96 divisors (see below), whose sum is σ = 63995904. Its totient is φ = 3807360.

The previous prime is 18327523. The next prime is 18327607. The reversal of 18327540 is 4572381.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18327498 and 18327507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2637 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (666624).

Almost surely, 2^18327540 is an apocalyptic number.

18327540 is a gapful number since it is divisible by the number (10) 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 18327540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31997952).

18327540 is an abundant number, since it is smaller than the sum of its proper divisors (45668364).

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

18327540 is a wasteful number, since it uses less digits than its factorization.

18327540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 18327540 is about 4281.0676238527. The cubic root of 18327540 is about 263.6542190191.

It can be divided in two parts, 183275 and 40, that added together give a triangular number (183315 = T₆₀₅).

The spelling of 18327540 in words is "eighteen million, three hundred twenty-seven thousand, five hundred forty".