20355306 has 16 divisors (see below), whose sum is σ = 41032704. Its totient is φ = 6731424.

The previous prime is 20355287. The next prime is 20355331. The reversal of 20355306 is 60355302.

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 7 ways as a sum of consecutive naturals, for example, 12595 + ... + 14118.

It is an arithmetic number, because the mean of its divisors is an integer number (2564544).

Almost surely, 2^20355306 is an apocalyptic number.

20355306 is an abundant number, since it is smaller than the sum of its proper divisors (20677398).

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

20355306 is a wasteful number, since it uses less digits than its factorization.

20355306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26845.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 20355306 is about 4511.6854943580. The cubic root of 20355306 is about 273.0397505482.

The spelling of 20355306 in words is "twenty million, three hundred fifty-five thousand, three hundred six".