20201022397 has 2 divisors, whose sum is σ = 20201022398. Its totient is φ = 20201022396.

The previous prime is 20201022371. The next prime is 20201022419. The reversal of 20201022397 is 79322010202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15842249956 + 4358772441 = 125866^2 + 66021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201022397 - 2¹⁵ = 20200989629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201022367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100511198 + 10100511199.

It is an arithmetic number, because the mean of its divisors is an integer number (10100511199).

Almost surely, 2^20201022397 is an apocalyptic number.

It is an amenable number.

20201022397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201022397 is an equidigital number, since it uses as much as digits as its factorization.

20201022397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20201022397 its reverse (79322010202), we get a palindrome (99523032599).

The spelling of 20201022397 in words is "twenty billion, two hundred one million, twenty-two thousand, three hundred ninety-seven".