19800201 has 4 divisors (see below), whose sum is σ = 26400272. Its totient is φ = 13200132.

The previous prime is 19800197. The next prime is 19800203. The reversal of 19800201 is 10200891.

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 not a de Polignac number, because 19800201 - 2² = 19800197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19800203) 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, 3300031 + ... + 3300036.

It is an arithmetic number, because the mean of its divisors is an integer number (6600068).

Almost surely, 2^19800201 is an apocalyptic number.

It is an amenable number.

19800201 is a deficient number, since it is larger than the sum of its proper divisors (6600071).

19800201 is an equidigital number, since it uses as much as digits as its factorization.

19800201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600070.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 19800201 is about 4449.7416778955. The cubic root of 19800201 is about 270.5348383395.

The spelling of 19800201 in words is "nineteen million, eight hundred thousand, two hundred one".