18066534 has 16 divisors (see below), whose sum is σ = 36815472. Its totient is φ = 5908448.

The previous prime is 18066487. The next prime is 18066571. The reversal of 18066534 is 43566081.

It is a junction number, because it is equal to n+sod(n) for n = 18066495 and 18066504.

It is a congruent number.

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, 28089 + ... + 28724.

It is an arithmetic number, because the mean of its divisors is an integer number (2300967).

Almost surely, 2^18066534 is an apocalyptic number.

18066534 is an abundant number, since it is smaller than the sum of its proper divisors (18748938).

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

18066534 is a wasteful number, since it uses less digits than its factorization.

18066534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56871.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 18066534 is about 4250.4745617401. The cubic root of 18066534 is about 262.3966468408.

The spelling of 18066534 in words is "eighteen million, sixty-six thousand, five hundred thirty-four".