20386 has 4 divisors (see below), whose sum is σ = 30582. Its totient is φ = 10192.

The previous prime is 20369. The next prime is 20389. The reversal of 20386 is 68302.

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

It can be written as a sum of positive squares in only one way, i.e., 15625 + 4761 = 125^2 + 69^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095 + ... + 5098.

2²⁰³⁸⁶ is an apocalyptic number.

20386 is a deficient number, since it is larger than the sum of its proper divisors (10196).

20386 is a wasteful number, since it uses less digits than its factorization.

20386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10195.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20386 is about 142.7795503565. The cubic root of 20386 is about 27.3176921551.

Adding to 20386 its reverse (68302), we get a palindrome (88688).

It can be divided in two parts, 203 and 86, that added together give a square (289 = 17²).

The spelling of 20386 in words is "twenty thousand, three hundred eighty-six".