18223243081 has 32 divisors (see below), whose sum is σ = 19322634240. Its totient is φ = 17165131200.

The previous prime is 18223243043. The next prime is 18223243111. The reversal of 18223243081 is 18034232281.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18223243081 - 2¹¹ = 18223241033 is a prime.

It is a super-2 number, since 2×18223243081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18223243021) 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 31 ways as a sum of consecutive naturals, for example, 76247760 + ... + 76247998.

It is an arithmetic number, because the mean of its divisors is an integer number (603832320).

Almost surely, 2^18223243081 is an apocalyptic number.

It is an amenable number.

18223243081 is a deficient number, since it is larger than the sum of its proper divisors (1099391159).

18223243081 is a wasteful number, since it uses less digits than its factorization.

18223243081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 18223243081 in words is "eighteen billion, two hundred twenty-three million, two hundred forty-three thousand, eighty-one".