18085340 has 96 divisors (see below), whose sum is σ = 49297920. Its totient is φ = 5412096.

The previous prime is 18085289. The next prime is 18085351. The reversal of 18085340 is 4358081.

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, 34319 + ... + 34841.

It is an arithmetic number, because the mean of its divisors is an integer number (513520).

Almost surely, 2^18085340 is an apocalyptic number.

18085340 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 18085340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24648960).

18085340 is an abundant number, since it is smaller than the sum of its proper divisors (31212580).

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

18085340 is a wasteful number, since it uses less digits than its factorization.

18085340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18085340 is about 4252.6862099149. The cubic root of 18085340 is about 262.4876607956.

The spelling of 18085340 in words is "eighteen million, eighty-five thousand, three hundred forty".