20823803 has 32 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 14716800.

The previous prime is 20823767. The next prime is 20823833. The reversal of 20823803 is 30832802.

It is not a de Polignac number, because 20823803 - 2¹² = 20819707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20823833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70925 + ... + 71217.

It is an arithmetic number, because the mean of its divisors is an integer number (889056).

Almost surely, 2^20823803 is an apocalyptic number.

20823803 is a deficient number, since it is larger than the sum of its proper divisors (7625989).

20823803 is a wasteful number, since it uses less digits than its factorization.

20823803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20823803 is about 4563.3105307441. The cubic root of 20823803 is about 275.1186397185.

It can be divided in two parts, 2082 and 3803, that added together give a palindrome (5885).

The spelling of 20823803 in words is "twenty million, eight hundred twenty-three thousand, eight hundred three".