18268641 has 12 divisors (see below), whose sum is σ = 27239680. Its totient is φ = 11786040.

The previous prime is 18268619. The next prime is 18268643. The reversal of 18268641 is 14686281.

18268641 is a `hidden beast` number, since 1 + 8 + 2 + 6 + 8 + 641 = 666.

It is not a de Polignac number, because 18268641 - 2⁵ = 18268609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18268596 and 18268605.

It is not an unprimeable number, because it can be changed into a prime (18268643) 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 11 ways as a sum of consecutive naturals, for example, 32461 + ... + 33018.

Almost surely, 2^18268641 is an apocalyptic number.

It is an amenable number.

18268641 is a deficient number, since it is larger than the sum of its proper divisors (8971039).

18268641 is a wasteful number, since it uses less digits than its factorization.

18268641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65516 (or 65513 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18268641 is about 4274.1830798411. The cubic root of 18268641 is about 263.3714817705.

The spelling of 18268641 in words is "eighteen million, two hundred sixty-eight thousand, six hundred forty-one".