18366612481 has 8 divisors (see below), whose sum is σ = 20992022720. Its totient is φ = 15741604368.

The previous prime is 18366612461. The next prime is 18366612497. The reversal of 18366612481 is 18421666381.

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

It is not a de Polignac number, because 18366612481 - 2⁷ = 18366612353 is a prime.

It is a super-2 number, since 2×18366612481² (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 (18366612401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4690 + ... + 191716.

It is an arithmetic number, because the mean of its divisors is an integer number (2624002840).

Almost surely, 2^18366612481 is an apocalyptic number.

It is an amenable number.

18366612481 is a deficient number, since it is larger than the sum of its proper divisors (2625410239).

18366612481 is a wasteful number, since it uses less digits than its factorization.

18366612481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201063.

The product of its digits is 331776, while the sum is 46.

The spelling of 18366612481 in words is "eighteen billion, three hundred sixty-six million, six hundred twelve thousand, four hundred eighty-one".