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19886 = 261163
BaseRepresentation
bin100110110101110
31000021112
410312232
51114021
6232022
7111656
oct46656
930245
1019886
1113a39
12b612
139089
147366
155d5b
hex4dae

19886 has 8 divisors (see below), whose sum is σ = 30504. Its totient is φ = 9720.

The previous prime is 19867. The next prime is 19889. The reversal of 19886 is 68891.

19886 = 692 + 702 + ... + 722.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19889) by changing a digit.

19886 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, 41 + ... + 203.

It is an arithmetic number, because the mean of its divisors is an integer number (3813).

219886 is an apocalyptic number.

19886 is a deficient number, since it is larger than the sum of its proper divisors (10618).

19886 is a wasteful number, since it uses less digits than its factorization.

19886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 3456, while the sum is 32.

The square root of 19886 is about 141.0177293818. The cubic root of 19886 is about 27.0925039293.

The spelling of 19886 in words is "nineteen thousand, eight hundred eighty-six".

Divisors: 1 2 61 122 163 326 9943 19886