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19882 = 29941
BaseRepresentation
bin100110110101010
31000021101
410312222
51114012
6232014
7111652
oct46652
930241
1019882
1113a35
12b60a
139085
147362
155d57
hex4daa

19882 has 4 divisors (see below), whose sum is σ = 29826. Its totient is φ = 9940.

The previous prime is 19867. The next prime is 19889. The reversal of 19882 is 28891.

It is a Cunningham number, because it is equal to 1412+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28891 = 167173.

It can be written as a sum of positive squares in only one way, i.e., 19881 + 1 = 141^2 + 1^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19882.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969 + ... + 4972.

219882 is an apocalyptic number.

19882 is a deficient number, since it is larger than the sum of its proper divisors (9944).

19882 is an equidigital number, since it uses as much as digits as its factorization.

19882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943.

The product of its digits is 1152, while the sum is 28.

The square root of 19882 is about 141.0035460547. The cubic root of 19882 is about 27.0906872864.

Subtracting 19882 from its reverse (28891), we obtain a palindrome (9009).

The spelling of 19882 in words is "nineteen thousand, eight hundred eighty-two".

Divisors: 1 2 9941 19882