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20208 = 243421
BaseRepresentation
bin100111011110000
31000201110
410323300
51121313
6233320
7112626
oct47360
930643
1020208
1114201
12b840
139276
147516
155ec3
hex4ef0

20208 has 20 divisors (see below), whose sum is σ = 52328. Its totient is φ = 6720.

The previous prime is 20201. The next prime is 20219. The reversal of 20208 is 80202.

It is a hoax number, since the sum of its digits (12) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 20193 and 20202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201) by changing a digit.

20208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163 + ... + 258.

220208 is an apocalyptic number.

It is an amenable number.

20208 is an abundant number, since it is smaller than the sum of its proper divisors (32120).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26164).

20208 is a wasteful number, since it uses less digits than its factorization.

20208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20208 is about 142.1548451513. The cubic root of 20208 is about 27.2379516358.

The spelling of 20208 in words is "twenty thousand, two hundred eight".

Divisors: 1 2 3 4 6 8 12 16 24 48 421 842 1263 1684 2526 3368 5052 6736 10104 20208