20850197 has 4 divisors (see below), whose sum is σ = 21522816. Its totient is φ = 20177580.

The previous prime is 20850169. The next prime is 20850223. The reversal of 20850197 is 79105802.

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 20850197 - 2¹² = 20846101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850107) 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, 336263 + ... + 336324.

It is an arithmetic number, because the mean of its divisors is an integer number (5380704).

Almost surely, 2^20850197 is an apocalyptic number.

It is an amenable number.

20850197 is a deficient number, since it is larger than the sum of its proper divisors (672619).

20850197 is an equidigital number, since it uses as much as digits as its factorization.

20850197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672618.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 20850197 is about 4566.2015943232. The cubic root of 20850197 is about 275.2348275186.

Adding to 20850197 its reverse (79105802), we get a palindrome (99955999).

It can be divided in two parts, 208 and 50197, that added together give a palindrome (50405).

The spelling of 20850197 in words is "twenty million, eight hundred fifty thousand, one hundred ninety-seven".