20448485 has 4 divisors (see below), whose sum is σ = 24538188. Its totient is φ = 16358784.

The previous prime is 20448469. The next prime is 20448511. The reversal of 20448485 is 58484402.

It is a Cunningham number, because it is equal to 4522²+1.

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 7365796 + 13082689 = 2714^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 20448485 - 2⁴ = 20448469 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, 2044844 + ... + 2044853.

It is an arithmetic number, because the mean of its divisors is an integer number (6134547).

Almost surely, 2^20448485 is an apocalyptic number.

It is an amenable number.

20448485 is a deficient number, since it is larger than the sum of its proper divisors (4089703).

20448485 is an equidigital number, since it uses as much as digits as its factorization.

20448485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089702.

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 20448485 is about 4522.0001105705. Note that the first 3 decimals coincide. The cubic root of 20448485 is about 273.4557411613.

The spelling of 20448485 in words is "twenty million, four hundred forty-eight thousand, four hundred eighty-five".