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18000564 = 2231500047
BaseRepresentation
bin100010010101…
…0101010110100
31020212112010120
41010222222310
514102004224
61441451540
7306000531
oct104525264
936775116
1018000564
11a1850aa
126040bb0
13396332a
142567d88
1518a8779
hex112aab4

18000564 has 12 divisors (see below), whose sum is σ = 42001344. Its totient is φ = 6000184.

The previous prime is 18000547. The next prime is 18000571. The reversal of 18000564 is 46500081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750012 + ... + 750035.

It is an arithmetic number, because the mean of its divisors is an integer number (3500112).

Almost surely, 218000564 is an apocalyptic number.

It is an amenable number.

18000564 is an abundant number, since it is smaller than the sum of its proper divisors (24000780).

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

18000564 is a wasteful number, since it uses less digits than its factorization.

18000564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500054 (or 1500052 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18000564 is about 4242.7071546361. The cubic root of 18000564 is about 262.0768766111.

The spelling of 18000564 in words is "eighteen million, five hundred sixty-four", and thus it is an aban number.

Divisors: 1 2 3 4 6 12 1500047 3000094 4500141 6000188 9000282 18000564