20316605 has 8 divisors (see below), whose sum is σ = 25663200. Its totient is φ = 15397776.

The previous prime is 20316587. The next prime is 20316623. The reversal of 20316605 is 50661302.

It is an interprime number because it is at equal distance from previous prime (20316587) and next prime (20316623).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20316605 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106835 + ... + 107024.

It is an arithmetic number, because the mean of its divisors is an integer number (3207900).

Almost surely, 2^20316605 is an apocalyptic number.

It is an amenable number.

20316605 is a deficient number, since it is larger than the sum of its proper divisors (5346595).

20316605 is a wasteful number, since it uses less digits than its factorization.

20316605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213883.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20316605 is about 4507.3944801848. The cubic root of 20316605 is about 272.8665997028.

Adding to 20316605 its reverse (50661302), we get a palindrome (70977907).

The spelling of 20316605 in words is "twenty million, three hundred sixteen thousand, six hundred five".