20805483 has 16 divisors (see below), whose sum is σ = 28192256. Its totient is φ = 13646880.

The previous prime is 20805481. The next prime is 20805487. The reversal of 20805483 is 38450802.

It is not a de Polignac number, because 20805483 - 2¹ = 20805481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20805483.

It is not an unprimeable number, because it can be changed into a prime (20805481) 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 15 ways as a sum of consecutive naturals, for example, 76638 + ... + 76908.

It is an arithmetic number, because the mean of its divisors is an integer number (1762016).

Almost surely, 2^20805483 is an apocalyptic number.

20805483 is a deficient number, since it is larger than the sum of its proper divisors (7386773).

20805483 is a wasteful number, since it uses less digits than its factorization.

20805483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20805483 is about 4561.3027744275. The cubic root of 20805483 is about 275.0379363642.

The spelling of 20805483 in words is "twenty million, eight hundred five thousand, four hundred eighty-three".