19985201 has 4 divisors (see below), whose sum is σ = 20191332. Its totient is φ = 19779072.

The previous prime is 19985197. The next prime is 19985209. The reversal of 19985201 is 10258991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10258991 = 439 ⋅23369.

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 5997601 = 3740^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 19985201 - 2² = 19985197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19985209) 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, 102920 + ... + 103113.

It is an arithmetic number, because the mean of its divisors is an integer number (5047833).

Almost surely, 2^19985201 is an apocalyptic number.

It is an amenable number.

19985201 is a deficient number, since it is larger than the sum of its proper divisors (206131).

19985201 is an equidigital number, since it uses as much as digits as its factorization.

19985201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206130.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 19985201 is about 4470.4810703100. The cubic root of 19985201 is about 271.3747940287.

The spelling of 19985201 in words is "nineteen million, nine hundred eighty-five thousand, two hundred one".