18066340 has 24 divisors (see below), whose sum is σ = 39936960. Its totient is φ = 6846048.

The previous prime is 18066337. The next prime is 18066379. The reversal of 18066340 is 4366081.

It is a junction number, because it is equal to n+sod(n) for n = 18066299 and 18066308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23392 + ... + 24151.

It is an arithmetic number, because the mean of its divisors is an integer number (1664040).

Almost surely, 2^18066340 is an apocalyptic number.

18066340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18066340 is an abundant number, since it is smaller than the sum of its proper divisors (21870620).

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

18066340 is a wasteful number, since it uses less digits than its factorization.

18066340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47571 (or 47569 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 18066340 is about 4250.4517406977. The cubic root of 18066340 is about 262.3957076249.

The spelling of 18066340 in words is "eighteen million, sixty-six thousand, three hundred forty".