18700201 has 4 divisors (see below), whose sum is σ = 20138692. Its totient is φ = 17261712.

The previous prime is 18700189. The next prime is 18700211. The reversal of 18700201 is 10200781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5017600 + 13682601 = 2240^2 + 3699^2 .

It is not a de Polignac number, because 18700201 - 2¹¹ = 18698153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18700211) 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, 719226 + ... + 719251.

It is an arithmetic number, because the mean of its divisors is an integer number (5034673).

Almost surely, 2^18700201 is an apocalyptic number.

It is an amenable number.

18700201 is a deficient number, since it is larger than the sum of its proper divisors (1438491).

18700201 is a wasteful number, since it uses less digits than its factorization.

18700201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438490.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 18700201 is about 4324.3729025143. The cubic root of 18700201 is about 265.4292367239.

Adding to 18700201 its reverse (10200781), we get a palindrome (28900982).

The spelling of 18700201 in words is "eighteen million, seven hundred thousand, two hundred one".