20104443397 has 2 divisors, whose sum is σ = 20104443398. Its totient is φ = 20104443396.

The previous prime is 20104443377. The next prime is 20104443409. The reversal of 20104443397 is 79334440102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11792656836 + 8311786561 = 108594^2 + 91169^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104443397 - 2³¹ = 17956959749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20104443367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052221698 + 10052221699.

It is an arithmetic number, because the mean of its divisors is an integer number (10052221699).

Almost surely, 2^20104443397 is an apocalyptic number.

It is an amenable number.

20104443397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104443397 is an equidigital number, since it uses as much as digits as its factorization.

20104443397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

Adding to 20104443397 its reverse (79334440102), we get a palindrome (99438883499).

The spelling of 20104443397 in words is "twenty billion, one hundred four million, four hundred forty-three thousand, three hundred ninety-seven".