20806846 has 8 divisors (see below), whose sum is σ = 31799304. Its totient is φ = 10207080.

The previous prime is 20806829. The next prime is 20806847. The reversal of 20806846 is 64860802.

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 (20806847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98040 + ... + 98251.

It is an arithmetic number, because the mean of its divisors is an integer number (3974913).

Almost surely, 2^20806846 is an apocalyptic number.

20806846 is a deficient number, since it is larger than the sum of its proper divisors (10992458).

20806846 is a wasteful number, since it uses less digits than its factorization.

20806846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196346.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 20806846 is about 4561.4521810494. The cubic root of 20806846 is about 275.0439422894.

The spelling of 20806846 in words is "twenty million, eight hundred six thousand, eight hundred forty-six".