20413305 has 72 divisors (see below), whose sum is σ = 40832064. Its totient is φ = 9408960.

The previous prime is 20413291. The next prime is 20413331. The reversal of 20413305 is 50331402.

It is not a de Polignac number, because 20413305 - 2⁵ = 20413273 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 125154 + ... + 125316.

It is an arithmetic number, because the mean of its divisors is an integer number (567112).

Almost surely, 2^20413305 is an apocalyptic number.

It is an amenable number.

20413305 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20413305 is a wasteful number, since it uses less digits than its factorization.

20413305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20413305 is about 4518.1085644327. The cubic root of 20413305 is about 273.2988314902.

Adding to 20413305 its reverse (50331402), we get a palindrome (70744707).

The spelling of 20413305 in words is "twenty million, four hundred thirteen thousand, three hundred five".