18066540 has 48 divisors (see below), whose sum is σ = 50789088. Its totient is φ = 4798464.

The previous prime is 18066487. The next prime is 18066571. The reversal of 18066540 is 4566081.

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 = 18066498 and 18066507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20754 + ... + 21606.

It is an arithmetic number, because the mean of its divisors is an integer number (1058106).

Almost surely, 2^18066540 is an apocalyptic number.

18066540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18066540 is an abundant number, since it is smaller than the sum of its proper divisors (32722548).

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

18066540 is a wasteful number, since it uses less digits than its factorization.

18066540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 18066540 is about 4250.4752675436. The cubic root of 18066540 is about 262.3966758886.

The spelling of 18066540 in words is "eighteen million, sixty-six thousand, five hundred forty".