Search a number
-
+
18799 = 111709
BaseRepresentation
bin100100101101111
3221210021
410211233
51100144
6223011
7105544
oct44557
927707
1018799
1113140
12aa67
138731
146bcb
155884
hex496f

18799 has 4 divisors (see below), whose sum is σ = 20520. Its totient is φ = 17080.

The previous prime is 18797. The next prime is 18803. The reversal of 18799 is 99781.

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 18799 - 21 = 18797 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18793) 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, 844 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (5130).

218799 is an apocalyptic number.

18799 is a deficient number, since it is larger than the sum of its proper divisors (1721).

18799 is a wasteful number, since it uses less digits than its factorization.

18799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its digits is 4536, while the sum is 34.

The square root of 18799 is about 137.1094453347. The cubic root of 18799 is about 26.5895864414.

The spelling of 18799 in words is "eighteen thousand, seven hundred ninety-nine".

Divisors: 1 11 1709 18799