20285854783 has 4 divisors (see below), whose sum is σ = 20286994320. Its totient is φ = 20284715248.

The previous prime is 20285854777. The next prime is 20285854793. The reversal of 20285854783 is 38745858202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38745858202 = 2 ⋅19372929101.

It is a cyclic number.

It is not a de Polignac number, because 20285854783 - 2⁵ = 20285854751 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 20285854783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285854723) 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 3 ways as a sum of consecutive naturals, for example, 542635 + ... + 578812.

It is an arithmetic number, because the mean of its divisors is an integer number (5071748580).

Almost surely, 2^20285854783 is an apocalyptic number.

20285854783 is a deficient number, since it is larger than the sum of its proper divisors (1139537).

20285854783 is a wasteful number, since it uses less digits than its factorization.

20285854783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139536.

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 20285854783 in words is "twenty billion, two hundred eighty-five million, eight hundred fifty-four thousand, seven hundred eighty-three".