20833305 has 8 divisors (see below), whose sum is σ = 33333312. Its totient is φ = 11111088.

The previous prime is 20833303. The next prime is 20833343. The reversal of 20833305 is 50333802.

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

It is not a de Polignac number, because 20833305 - 2¹ = 20833303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20833301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694429 + ... + 694458.

It is an arithmetic number, because the mean of its divisors is an integer number (4166664).

Almost surely, 2^20833305 is an apocalyptic number.

It is an amenable number.

20833305 is a deficient number, since it is larger than the sum of its proper divisors (12500007).

20833305 is a wasteful number, since it uses less digits than its factorization.

20833305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388895.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20833305 is about 4564.3515421142. The cubic root of 20833305 is about 275.1604793350.

The spelling of 20833305 in words is "twenty million, eight hundred thirty-three thousand, three hundred five".