20206823 has 48 divisors (see below), whose sum is σ = 28108800. Its totient is φ = 14152320.

The previous prime is 20206819. The next prime is 20206853. The reversal of 20206823 is 32860202.

It is not a de Polignac number, because 20206823 - 2² = 20206819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 651818 + ... + 651848.

It is an arithmetic number, because the mean of its divisors is an integer number (585600).

Almost surely, 2^20206823 is an apocalyptic number.

20206823 is a deficient number, since it is larger than the sum of its proper divisors (7901977).

20206823 is a wasteful number, since it uses less digits than its factorization.

20206823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20206823 is about 4495.1999955508. The cubic root of 20206823 is about 272.3742280742.

The spelling of 20206823 in words is "twenty million, two hundred six thousand, eight hundred twenty-three".