18006534 has 48 divisors (see below), whose sum is σ = 48021792. Its totient is φ = 4748544.

The previous prime is 18006497. The next prime is 18006557. The reversal of 18006534 is 43560081.

18006534 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 653 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18006498 and 18006507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3859 + ... + 7134.

It is an arithmetic number, because the mean of its divisors is an integer number (1000454).

Almost surely, 2^18006534 is an apocalyptic number.

18006534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18006534 is an abundant number, since it is smaller than the sum of its proper divisors (30015258).

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

18006534 is a wasteful number, since it uses less digits than its factorization.

18006534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021 (or 11018 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 18006534 is about 4243.4106565356. The cubic root of 18006534 is about 262.1058465555.

The spelling of 18006534 in words is "eighteen million, six thousand, five hundred thirty-four".