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10018 = 25009
BaseRepresentation
bin10011100100010
3111202001
42130202
5310033
6114214
741131
oct23442
914661
1010018
117588
12596a
134738
143918
152e7d
hex2722

10018 has 4 divisors (see below), whose sum is σ = 15030. Its totient is φ = 5008.

The previous prime is 10009. The next prime is 10037. The reversal of 10018 is 81001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8649 + 1369 = 93^2 + 37^2 .

10018 is a modest number, since divided by 18 gives 10 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 9986 and 10013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2503 + ... + 2506.

210018 is an apocalyptic number.

10018 is the 54-th centered heptagonal number.

10018 is a deficient number, since it is larger than the sum of its proper divisors (5012).

10018 is an equidigital number, since it uses as much as digits as its factorization.

10018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 10018 is about 100.0899595364. The cubic root of 10018 is about 21.5572657602.

The spelling of 10018 in words is "ten thousand, eighteen".

Divisors: 1 2 5009 10018