20200297 has 4 divisors (see below), whose sum is σ = 21754180. Its totient is φ = 18646416.

The previous prime is 20200289. The next prime is 20200309. The reversal of 20200297 is 79200202.

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 13039321 + 7160976 = 3611^2 + 2676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200297 - 2³ = 20200289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776922 + ... + 776947.

It is an arithmetic number, because the mean of its divisors is an integer number (5438545).

Almost surely, 2^20200297 is an apocalyptic number.

It is an amenable number.

20200297 is a deficient number, since it is larger than the sum of its proper divisors (1553883).

20200297 is a wasteful number, since it uses less digits than its factorization.

20200297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553882.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20200297 is about 4494.4740515437. The cubic root of 20200297 is about 272.3449029035.

Adding to 20200297 its reverse (79200202), we get a palindrome (99400499).

The spelling of 20200297 in words is "twenty million, two hundred thousand, two hundred ninety-seven".