20806383 has 16 divisors (see below), whose sum is σ = 30514176. Its totient is φ = 12530400.

The previous prime is 20806339. The next prime is 20806391. The reversal of 20806383 is 38360802.

It is not a de Polignac number, because 20806383 - 2⁸ = 20806127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20806383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3843 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (1907136).

Almost surely, 2^20806383 is an apocalyptic number.

20806383 is a deficient number, since it is larger than the sum of its proper divisors (9707793).

20806383 is a wasteful number, since it uses less digits than its factorization.

20806383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11414.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20806383 is about 4561.4014293855. The cubic root of 20806383 is about 275.0419021549.

The spelling of 20806383 in words is "twenty million, eight hundred six thousand, three hundred eighty-three".