18124681 has 8 divisors (see below), whose sum is σ = 18878400. Its totient is φ = 17379600.

The previous prime is 18124661. The next prime is 18124697. The reversal of 18124681 is 18642181.

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 18124681 - 2⁵ = 18124649 is a prime.

It is a super-2 number, since 2×18124681² = 657008122703522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18124661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2310 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (2359800).

Almost surely, 2^18124681 is an apocalyptic number.

It is an amenable number.

18124681 is a deficient number, since it is larger than the sum of its proper divisors (753719).

18124681 is a wasteful number, since it uses less digits than its factorization.

18124681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319.

The product of its digits is 3072, while the sum is 31.

The square root of 18124681 is about 4257.3091266667. The cubic root of 18124681 is about 262.6778525632.

The spelling of 18124681 in words is "eighteen million, one hundred twenty-four thousand, six hundred eighty-one".