20459648 has 48 divisors (see below), whose sum is σ = 44835630. Its totient is φ = 9292800.

The previous prime is 20459629. The next prime is 20459651. The reversal of 20459648 is 84695402.

It can be written as a sum of positive squares in only one way, i.e., 13017664 + 7441984 = 3608^2 + 2728^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14828 + ... + 16148.

Almost surely, 2^20459648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20459648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22417815).

20459648 is an abundant number, since it is smaller than the sum of its proper divisors (24375982).

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

20459648 is a wasteful number, since it uses less digits than its factorization.

20459648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 20459648 is about 4523.2342411155. The cubic root of 20459648 is about 273.5054927057.

The spelling of 20459648 in words is "twenty million, four hundred fifty-nine thousand, six hundred forty-eight".