20316005 has 8 divisors (see below), whose sum is σ = 25165824. Its totient is φ = 15728400.

The previous prime is 20315917. The next prime is 20316017. The reversal of 20316005 is 50061302.

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

It is not a de Polignac number, because 20316005 - 2⁸ = 20315749 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 65381 + ... + 65690.

It is an arithmetic number, because the mean of its divisors is an integer number (3145728).

Almost surely, 2^20316005 is an apocalyptic number.

It is an amenable number.

20316005 is a deficient number, since it is larger than the sum of its proper divisors (4849819).

20316005 is a wasteful number, since it uses less digits than its factorization.

20316005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131107.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20316005 is about 4507.3279223948. The cubic root of 20316005 is about 272.8639135327.

Adding to 20316005 its reverse (50061302), we get a palindrome (70377307).

The spelling of 20316005 in words is "twenty million, three hundred sixteen thousand, five".