20805846 has 16 divisors (see below), whose sum is σ = 43421184. Its totient is φ = 6633704.

The previous prime is 20805791. The next prime is 20805853. The reversal of 20805846 is 64850802.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75246 + ... + 75521.

It is an arithmetic number, because the mean of its divisors is an integer number (2713824).

Almost surely, 2^20805846 is an apocalyptic number.

20805846 is an abundant number, since it is smaller than the sum of its proper divisors (22615338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20805846 is a wasteful number, since it uses less digits than its factorization.

20805846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150795.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 20805846 is about 4561.3425655173. The cubic root of 20805846 is about 275.0395359136.

The spelling of 20805846 in words is "twenty million, eight hundred five thousand, eight hundred forty-six".