20448680 has 48 divisors (see below), whose sum is σ = 53526420. Its totient is φ = 7010304.

The previous prime is 20448661. The next prime is 20448689. The reversal of 20448680 is 8684402.

It can be written as a sum of positive squares in 2 ways, for example, as 20448484 + 196 = 4522^2 + 14^2 .

It is not an unprimeable number, because it can be changed into a prime (20448689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3257 + ... + 7176.

Almost surely, 2^20448680 is an apocalyptic number.

20448680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20448680 is an abundant number, since it is smaller than the sum of its proper divisors (33077740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20448680 is a wasteful number, since it uses less digits than its factorization.

20448680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458 (or 10447 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 20448680 is about 4522.0216717747. The cubic root of 20448680 is about 273.4566103977.

It can be divided in two parts, 204 and 48680, that added together give a palindrome (48884).

The spelling of 20448680 in words is "twenty million, four hundred forty-eight thousand, six hundred eighty".