18206241 has 4 divisors (see below), whose sum is σ = 24274992. Its totient is φ = 12137492.

The previous prime is 18206233. The next prime is 18206263. The reversal of 18206241 is 14260281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18206241 - 2³ = 18206233 is a prime.

It is a super-2 number, since 2×18206241² = 662934422700162, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18206281) 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 3 ways as a sum of consecutive naturals, for example, 3034371 + ... + 3034376.

It is an arithmetic number, because the mean of its divisors is an integer number (6068748).

Almost surely, 2^18206241 is an apocalyptic number.

It is an amenable number.

18206241 is a deficient number, since it is larger than the sum of its proper divisors (6068751).

18206241 is an equidigital number, since it uses as much as digits as its factorization.

18206241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6068750.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18206241 is about 4266.8771953268. The cubic root of 18206241 is about 263.0712746628.

The spelling of 18206241 in words is "eighteen million, two hundred six thousand, two hundred forty-one".