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20299 = 53383
BaseRepresentation
bin100111101001011
31000211211
410331023
51122144
6233551
7113116
oct47513
930754
1020299
1114284
12b8b7
139316
14757d
156034
hex4f4b

20299 has 4 divisors (see below), whose sum is σ = 20736. Its totient is φ = 19864.

The previous prime is 20297. The next prime is 20323. The reversal of 20299 is 99202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20299 - 21 = 20297 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20297) 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, 139 + ... + 244.

It is an arithmetic number, because the mean of its divisors is an integer number (5184).

220299 is an apocalyptic number.

20299 is a deficient number, since it is larger than the sum of its proper divisors (437).

20299 is an equidigital number, since it uses as much as digits as its factorization.

20299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20299 is about 142.4745591325. The cubic root of 20299 is about 27.2787760994.

The spelling of 20299 in words is "twenty thousand, two hundred ninety-nine".

Divisors: 1 53 383 20299