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20141 = 111831
BaseRepresentation
bin100111010101101
31000121222
410322231
51121031
6233125
7112502
oct47255
930558
1020141
1114150
12b7a5
139224
1474a9
155e7b
hex4ead

20141 has 4 divisors (see below), whose sum is σ = 21984. Its totient is φ = 18300.

The previous prime is 20129. The next prime is 20143. The reversal of 20141 is 14102.

Adding to 20141 its reverse (14102), we get a palindrome (34243).

It can be divided in two parts, 201 and 41, that added together give a palindrome (242).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905 + ... + 926.

It is an arithmetic number, because the mean of its divisors is an integer number (5496).

220141 is an apocalyptic number.

It is an amenable number.

20141 is a deficient number, since it is larger than the sum of its proper divisors (1843).

20141 is a wasteful number, since it uses less digits than its factorization.

20141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20141 is about 141.9189909772. The cubic root of 20141 is about 27.2078156606.

The spelling of 20141 in words is "twenty thousand, one hundred forty-one", and thus it is an iban number.

Divisors: 1 11 1831 20141