22749724818 has 54 divisors (see below), whose sum is σ = 50078370069. Its totient is φ = 7464003552.

The previous prime is 22749724793. The next prime is 22749724861. The reversal of 22749724818 is 81842794722.

22749724818 is a `hidden beast` number, since 2 + 2 + 74 + 97 + 2 + 481 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22645133289 + 104591529 = 150483^2 + 10227^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=106653.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 46713771 + ... + 46714257.

Almost surely, 2^22749724818 is an apocalyptic number.

22749724818 is an abundant number, since it is smaller than the sum of its proper divisors (27328645251).

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

22749724818 is an frugal number, since it uses more digits than its factorization.

22749724818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 565 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 22749724818 in words is "twenty-two billion, seven hundred forty-nine million, seven hundred twenty-four thousand, eight hundred eighteen".