20044397 has 2 divisors, whose sum is σ = 20044398. Its totient is φ = 20044396.

The previous prime is 20044393. The next prime is 20044447. The reversal of 20044397 is 79344002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 561001 = 4414^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044397 - 2² = 20044393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20044393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022198 + 10022199.

It is an arithmetic number, because the mean of its divisors is an integer number (10022199).

Almost surely, 2^20044397 is an apocalyptic number.

It is an amenable number.

20044397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20044397 is an equidigital number, since it uses as much as digits as its factorization.

20044397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20044397 is about 4477.0969388656. The cubic root of 20044397 is about 271.6424665526.

Adding to 20044397 its reverse (79344002), we get a palindrome (99388399).

The spelling of 20044397 in words is "twenty million, forty-four thousand, three hundred ninety-seven".