20824853 has 6 divisors (see below), whose sum is σ = 24224886. Its totient is φ = 17849832.

The previous prime is 20824799. The next prime is 20824861. The reversal of 20824853 is 35842802.

It can be written as a sum of positive squares in only one way, i.e., 12945604 + 7879249 = 3598^2 + 2807^2 .

It is not a de Polignac number, because 20824853 - 2⁶ = 20824789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824253) 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 5 ways as a sum of consecutive naturals, for example, 212450 + ... + 212547.

It is an arithmetic number, because the mean of its divisors is an integer number (4037481).

Almost surely, 2^20824853 is an apocalyptic number.

It is an amenable number.

20824853 is a deficient number, since it is larger than the sum of its proper divisors (3400033).

20824853 is an equidigital number, since it uses as much as digits as its factorization.

20824853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425011 (or 425004 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 20824853 is about 4563.4255773487. The cubic root of 20824853 is about 275.1232637493.

The spelling of 20824853 in words is "twenty million, eight hundred twenty-four thousand, eight hundred fifty-three".