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20394 = 23211103
BaseRepresentation
bin100111110101010
31000222100
410332222
51123034
6234230
7113313
oct47652
930870
1020394
1114360
12b976
13938a
14760a
156099
hex4faa

20394 has 24 divisors (see below), whose sum is σ = 48672. Its totient is φ = 6120.

The previous prime is 20393. The next prime is 20399. The reversal of 20394 is 49302.

Added to its reverse (49302) it gives a square (69696 = 2642).

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

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (20393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147 + ... + 249.

It is an arithmetic number, because the mean of its divisors is an integer number (2028).

220394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24336).

20394 is an abundant number, since it is smaller than the sum of its proper divisors (28278).

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

20394 is a wasteful number, since it uses less digits than its factorization.

20394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20394 is about 142.8075628249. The cubic root of 20394 is about 27.3212650802.

Adding to 20394 its reverse (49302), we get a palindrome (69696).

It can be divided in two parts, 20 and 394, that added together give a palindrome (414).

The spelling of 20394 in words is "twenty thousand, three hundred ninety-four".

Divisors: 1 2 3 6 9 11 18 22 33 66 99 103 198 206 309 618 927 1133 1854 2266 3399 6798 10197 20394