20955306 has 8 divisors (see below), whose sum is σ = 41910624. Its totient is φ = 6985100.

The previous prime is 20955293. The next prime is 20955331. The reversal of 20955306 is 60355902.

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

20955306 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1746270 + ... + 1746281.

It is an arithmetic number, because the mean of its divisors is an integer number (5238828).

Almost surely, 2^20955306 is an apocalyptic number.

20955306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20955306 is a wasteful number, since it uses less digits than its factorization.

20955306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492556.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 20955306 is about 4577.6965823436. The cubic root of 20955306 is about 275.6965526564.

The spelling of 20955306 in words is "twenty million, nine hundred fifty-five thousand, three hundred six".