20056305 has 16 divisors (see below), whose sum is σ = 33779520. Its totient is φ = 10133568.

The previous prime is 20056303. The next prime is 20056321. The reversal of 20056305 is 50365002.

It is not a de Polignac number, because 20056305 - 2¹ = 20056303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20056303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34902 + ... + 35471.

It is an arithmetic number, because the mean of its divisors is an integer number (2111220).

Almost surely, 2^20056305 is an apocalyptic number.

It is an amenable number.

20056305 is a deficient number, since it is larger than the sum of its proper divisors (13723215).

20056305 is a wasteful number, since it uses less digits than its factorization.

20056305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70400.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20056305 is about 4478.4266210356. The cubic root of 20056305 is about 271.6962484672.

The spelling of 20056305 in words is "twenty million, fifty-six thousand, three hundred five".