20244197 has 4 divisors (see below), whose sum is σ = 20301900. Its totient is φ = 20186496.

The previous prime is 20244193. The next prime is 20244199. The reversal of 20244197 is 79144202.

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 10042561 + 10201636 = 3169^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 20244197 - 2² = 20244193 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 (20244193) 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, 28322 + ... + 29027.

It is an arithmetic number, because the mean of its divisors is an integer number (5075475).

Almost surely, 2^20244197 is an apocalyptic number.

It is an amenable number.

20244197 is a deficient number, since it is larger than the sum of its proper divisors (57703).

20244197 is an equidigital number, since it uses as much as digits as its factorization.

20244197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57702.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20244197 is about 4499.3551760224. The cubic root of 20244197 is about 272.5420500156.

Adding to 20244197 its reverse (79144202), we get a palindrome (99388399).

The spelling of 20244197 in words is "twenty million, two hundred forty-four thousand, one hundred ninety-seven".