20566315 has 16 divisors (see below), whose sum is σ = 30769920. Its totient is φ = 12820320.

The previous prime is 20566267. The next prime is 20566331. The reversal of 20566315 is 51366502.

It is not a de Polignac number, because 20566315 - 2¹³ = 20558123 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 26325 + ... + 27094.

It is an arithmetic number, because the mean of its divisors is an integer number (1923120).

Almost surely, 2^20566315 is an apocalyptic number.

20566315 is a deficient number, since it is larger than the sum of its proper divisors (10203605).

20566315 is a wasteful number, since it uses less digits than its factorization.

20566315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53442.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20566315 is about 4535.0099228116. The cubic root of 20566315 is about 273.9799788237.

The spelling of 20566315 in words is "twenty million, five hundred sixty-six thousand, three hundred fifteen".