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18875 = 53151
BaseRepresentation
bin100100110111011
3221220002
410212323
51101000
6223215
7106013
oct44673
927802
1018875
11131aa
12ab0b
13878c
146c43
1558d5
hex49bb

18875 has 8 divisors (see below), whose sum is σ = 23712. Its totient is φ = 15000.

The previous prime is 18869. The next prime is 18899. The reversal of 18875 is 57881.

Adding to 18875 its product of digits (2240), we get a triangular number (21115 = T205).

It is a happy number.

It is not a de Polignac number, because 18875 - 24 = 18859 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

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, 50 + ... + 200.

It is an arithmetic number, because the mean of its divisors is an integer number (2964).

218875 is an apocalyptic number.

18875 is a deficient number, since it is larger than the sum of its proper divisors (4837).

18875 is an equidigital number, since it uses as much as digits as its factorization.

18875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 156 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 18875 is about 137.3863166403. The cubic root of 18875 is about 26.6253701081.

The spelling of 18875 in words is "eighteen thousand, eight hundred seventy-five".

Divisors: 1 5 25 125 151 755 3775 18875