20724802848 has 144 divisors (see below), whose sum is σ = 60526642176. Its totient is φ = 6723924480.

The previous prime is 20724802841. The next prime is 20724802849. The reversal of 20724802848 is 84820842702.

20724802848 is a `hidden beast` number, since 20 + 72 + 480 + 2 + 84 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×20724802848² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20724802841) 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, 1933183 + ... + 1943873.

It is an arithmetic number, because the mean of its divisors is an integer number (420323904).

Almost surely, 2^20724802848 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 20724802848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30263321088).

20724802848 is an abundant number, since it is smaller than the sum of its proper divisors (39801839328).

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

20724802848 is a wasteful number, since it uses less digits than its factorization.

20724802848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10887 (or 10876 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 45.

The spelling of 20724802848 in words is "twenty billion, seven hundred twenty-four million, eight hundred two thousand, eight hundred forty-eight".