20846 has 8 divisors (see below), whose sum is σ = 35760. Its totient is φ = 8928.

The previous prime is 20809. The next prime is 20849. The reversal of 20846 is 64802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20849) by changing a digit.

20846 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731 + ... + 758.

It is an arithmetic number, because the mean of its divisors is an integer number (4470).

2²⁰⁸⁴⁶ is an apocalyptic number.

20846 is a deficient number, since it is larger than the sum of its proper divisors (14914).

20846 is a wasteful number, since it uses less digits than its factorization.

20846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20846 is about 144.3814392503. The cubic root of 20846 is about 27.5216358659.

Subtracting 20846 from its reverse (64802), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 20846 in words is "twenty thousand, eight hundred forty-six".