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BaseRepresentation
bin100010010101…
…0100010100100
31020212111102000
41010222202210
514102000121
61441445300
7305666145
oct104524244
936774360
1018000036
11a18476a
126040830
133963012
142567acc
1518a8526
hex112a8a4

18000036 has 24 divisors (see below), whose sum is σ = 46667040. Its totient is φ = 5999976.

The previous prime is 17999987. The next prime is 18000041. The reversal of 18000036 is 63000081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 17999982 and 18000018.

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, 83226 + ... + 83441.

It is an arithmetic number, because the mean of its divisors is an integer number (1944460).

Almost surely, 218000036 is an apocalyptic number.

It is an amenable number.

18000036 is an abundant number, since it is smaller than the sum of its proper divisors (28667004).

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

18000036 is a wasteful number, since it uses less digits than its factorization.

18000036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166680 (or 166672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18000036 is about 4242.6449297579. The cubic root of 18000036 is about 262.0743141369.

The spelling of 18000036 in words is "eighteen million, thirty-six", and thus it is an aban number and an uban number.