20403459648 has 168 divisors, whose sum is σ = 68707382016. Its totient is φ = 5707238400.

The previous prime is 20403459647. The next prime is 20403459677. The reversal of 20403459648 is 84695430402.

20403459648 is a `hidden beast` number, since 20 + 4 + 0 + 34 + 596 + 4 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (20403459647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41488 + ... + 206223.

It is an arithmetic number, because the mean of its divisors is an integer number (408972512).

Almost surely, 2^20403459648 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 20403459648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34353691008).

20403459648 is an abundant number, since it is smaller than the sum of its proper divisors (48303922368).

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

20403459648 is a wasteful number, since it uses less digits than its factorization.

20403459648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247753 (or 247740 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 20403459648 in words is "twenty billion, four hundred three million, four hundred fifty-nine thousand, six hundred forty-eight".