20806363 has 8 divisors (see below), whose sum is σ = 21611520. Its totient is φ = 20009640.

The previous prime is 20806339. The next prime is 20806391. The reversal of 20806363 is 36360802.

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

It is a cyclic number.

It is not a de Polignac number, because 20806363 - 2¹³ = 20798171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20806663) by changing a digit.

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, 3168 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (2701440).

Almost surely, 2^20806363 is an apocalyptic number.

20806363 is a deficient number, since it is larger than the sum of its proper divisors (805157).

20806363 is a wasteful number, since it uses less digits than its factorization.

20806363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20806363 is about 4561.3992370763. The cubic root of 20806363 is about 275.0418140275.

The spelling of 20806363 in words is "twenty million, eight hundred six thousand, three hundred sixty-three".