16818340 has 96 divisors (see below), whose sum is σ = 44964864. Its totient is φ = 5132160.

The previous prime is 16818317. The next prime is 16818343. The reversal of 16818340 is 4381861.

It is not an unprimeable number, because it can be changed into a prime (16818343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103099 + ... + 103261.

It is an arithmetic number, because the mean of its divisors is an integer number (468384).

Almost surely, 2^16818340 is an apocalyptic number.

16818340 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 16818340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22482432).

16818340 is an abundant number, since it is smaller than the sum of its proper divisors (28146524).

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

16818340 is a wasteful number, since it uses less digits than its factorization.

16818340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 16818340 is about 4101.0169470511. The cubic root of 16818340 is about 256.2089968103.

The spelling of 16818340 in words is "sixteen million, eight hundred eighteen thousand, three hundred forty".