18806201 has 4 divisors (see below), whose sum is σ = 18818304. Its totient is φ = 18794100.

The previous prime is 18806197. The next prime is 18806209. The reversal of 18806201 is 10260881.

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 18806201 - 2² = 18806197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18806209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3305 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (4704576).

Almost surely, 2^18806201 is an apocalyptic number.

It is an amenable number.

18806201 is a deficient number, since it is larger than the sum of its proper divisors (12103).

18806201 is a wasteful number, since it uses less digits than its factorization.

18806201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12102.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 18806201 is about 4336.6116957828. The cubic root of 18806201 is about 265.9298107533.

The spelling of 18806201 in words is "eighteen million, eight hundred six thousand, two hundred one".