18205201 has 8 divisors (see below), whose sum is σ = 20965824. Its totient is φ = 15484560.

The previous prime is 18205183. The next prime is 18205237. The reversal of 18205201 is 10250281.

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

It is not a de Polignac number, because 18205201 - 2⁵ = 18205169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18205241) 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, 9010 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (2620728).

Almost surely, 2^18205201 is an apocalyptic number.

It is an amenable number.

18205201 is a deficient number, since it is larger than the sum of its proper divisors (2760623).

18205201 is a wasteful number, since it uses less digits than its factorization.

18205201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19991.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 18205201 is about 4266.7553245997. The cubic root of 18205201 is about 263.0662654037.

Adding to 18205201 its reverse (10250281), we get a palindrome (28455482).

It can be divided in two parts, 1820 and 5201, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 18205201 in words is "eighteen million, two hundred five thousand, two hundred one".