20013244397 has 2 divisors, whose sum is σ = 20013244398. Its totient is φ = 20013244396.

The previous prime is 20013244319. The next prime is 20013244411. The reversal of 20013244397 is 79344231002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19067743396 + 945501001 = 138086^2 + 30749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013244397 - 2¹⁴ = 20013228013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013244297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006622198 + 10006622199.

It is an arithmetic number, because the mean of its divisors is an integer number (10006622199).

Almost surely, 2^20013244397 is an apocalyptic number.

It is an amenable number.

20013244397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013244397 is an equidigital number, since it uses as much as digits as its factorization.

20013244397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 20013244397 its reverse (79344231002), we get a palindrome (99357475399).

The spelling of 20013244397 in words is "twenty billion, thirteen million, two hundred forty-four thousand, three hundred ninety-seven".