24720720804 has 120 divisors (see below), whose sum is σ = 72622186560. Its totient is φ = 7275635136.

The previous prime is 24720720757. The next prime is 24720720809. The reversal of 24720720804 is 40802702742.

24720720804 is a `hidden beast` number, since 247 + 207 + 208 + 0 + 4 = 666.

It is a super-2 number, since 2×24720720804² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (24720720809) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30714 + ... + 224465.

It is an arithmetic number, because the mean of its divisors is an integer number (605184888).

Almost surely, 2^24720720804 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 24720720804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36311093280).

24720720804 is an abundant number, since it is smaller than the sum of its proper divisors (47901465756).

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

24720720804 is a wasteful number, since it uses less digits than its factorization.

24720720804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255231 (or 255220 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The spelling of 24720720804 in words is "twenty-four billion, seven hundred twenty million, seven hundred twenty thousand, eight hundred four".