22470728018 has 6 divisors (see below), whose sum is σ = 33706410021. Its totient is φ = 11235258012.

The previous prime is 22470728011. The next prime is 22470728057. The reversal of 22470728018 is 81082707422.

It can be written as a sum of positive squares in 2 ways, for example, as 22003865569 + 466862449 = 148337^2 + 21607^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105997.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22470728011) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 158996 + ... + 264992.

Almost surely, 2^22470728018 is an apocalyptic number.

22470728018 is a deficient number, since it is larger than the sum of its proper divisors (11235682003).

22470728018 is an frugal number, since it uses more digits than its factorization.

22470728018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211996 (or 105999 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 22470728018 in words is "twenty-two billion, four hundred seventy million, seven hundred twenty-eight thousand, eighteen".