20873424205 has 4 divisors (see below), whose sum is σ = 25048109052. Its totient is φ = 16698739360.

The previous prime is 20873424199. The next prime is 20873424233. The reversal of 20873424205 is 50242437802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13772665449 + 7100758756 = 117357^2 + 84266^2 .

It is not a de Polignac number, because 20873424205 - 2¹³ = 20873416013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087342416 + ... + 2087342425.

It is an arithmetic number, because the mean of its divisors is an integer number (6262027263).

Almost surely, 2^20873424205 is an apocalyptic number.

It is an amenable number.

20873424205 is a deficient number, since it is larger than the sum of its proper divisors (4174684847).

20873424205 is an equidigital number, since it uses as much as digits as its factorization.

20873424205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174684846.

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 20873424205 in words is "twenty billion, eight hundred seventy-three million, four hundred twenty-four thousand, two hundred five".