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19682 = 213757
BaseRepresentation
bin100110011100010
3222222222
410303202
51112212
6231042
7111245
oct46342
928888
1019682
1113873
12b482
138c60
14725c
155c72
hex4ce2

19682 has 8 divisors (see below), whose sum is σ = 31836. Its totient is φ = 9072.

The previous prime is 19681. The next prime is 19687. The reversal of 19682 is 28691.

19682 divided by its sum of digits (26) gives a palindrome (757).

Subtracting 19682 from its reverse (28691), we obtain a palindrome (9009).

19682 is nontrivially palindromic in base 3.

It is a Cunningham number, because it is equal to 39-1.

It can be written as a sum of positive squares in 2 ways, for example, as 19321 + 361 = 139^2 + 19^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×196822 = 774762248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 757 = 19682 / (1 + 9 + 6 + 8 + 2).

19682 is a nontrivial repdigit in base 3.

It is a plaindrome in base 3, base 7 and base 9.

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19682.

It is not an unprimeable number, because it can be changed into a prime (19681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 404.

19682 is a Friedman number, since it can be written as (6/2)^9-1^8, using all its digits and the basic arithmetic operations.

219682 is an apocalyptic number.

19682 is a deficient number, since it is larger than the sum of its proper divisors (12154).

19682 is a wasteful number, since it uses less digits than its factorization.

19682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 864, while the sum is 26.

The square root of 19682 is about 140.2925514773. The cubic root of 19682 is about 26.9995427449. Note that the first 3 decimals are identical.

The spelling of 19682 in words is "nineteen thousand, six hundred eighty-two".

Divisors: 1 2 13 26 757 1514 9841 19682