18241805 has 16 divisors (see below), whose sum is σ = 23483520. Its totient is φ = 13560768.

The previous prime is 18241801. The next prime is 18241807. The reversal of 18241805 is 50814281.

It is a cyclic number.

It is not a de Polignac number, because 18241805 - 2² = 18241801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18241801) 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 15 ways as a sum of consecutive naturals, for example, 3224 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (1467720).

Almost surely, 2^18241805 is an apocalyptic number.

It is an amenable number.

18241805 is a deficient number, since it is larger than the sum of its proper divisors (5241715).

18241805 is a wasteful number, since it uses less digits than its factorization.

18241805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18241805 is about 4271.0426127586. The cubic root of 18241805 is about 263.2424573818.

The spelling of 18241805 in words is "eighteen million, two hundred forty-one thousand, eight hundred five".