18184564481 has 8 divisors (see below), whose sum is σ = 18227465064. Its totient is φ = 18141701760.

The previous prime is 18184564379. The next prime is 18184564501. The reversal of 18184564481 is 18446548181.

It can be written as a sum of positive squares in 4 ways, for example, as 244640881 + 17939923600 = 15641^2 + 133940^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18184564481 - 2²⁶ = 18117455617 is a prime.

It is a super-2 number, since 2×18184564481² (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 (18184561481) 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 7 ways as a sum of consecutive naturals, for example, 1101911 + ... + 1118291.

It is an arithmetic number, because the mean of its divisors is an integer number (2278433133).

Almost surely, 2^18184564481 is an apocalyptic number.

It is an amenable number.

18184564481 is a deficient number, since it is larger than the sum of its proper divisors (42900583).

18184564481 is a wasteful number, since it uses less digits than its factorization.

18184564481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931.

The product of its digits is 983040, while the sum is 50.

The spelling of 18184564481 in words is "eighteen billion, one hundred eighty-four million, five hundred sixty-four thousand, four hundred eighty-one".