13444420357 has 2 divisors, whose sum is σ = 13444420358. Its totient is φ = 13444420356.

The previous prime is 13444420321. The next prime is 13444420361. The reversal of 13444420357 is 75302444431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13208675041 + 235745316 = 114929^2 + 15354^2 .

It is a cyclic number.

It is not a de Polignac number, because 13444420357 - 2²⁷ = 13310202629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13444420757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722210178 + 6722210179.

It is an arithmetic number, because the mean of its divisors is an integer number (6722210179).

Almost surely, 2^13444420357 is an apocalyptic number.

It is an amenable number.

13444420357 is a deficient number, since it is larger than the sum of its proper divisors (1).

13444420357 is an equidigital number, since it uses as much as digits as its factorization.

13444420357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 37.

Adding to 13444420357 its reverse (75302444431), we get a palindrome (88746864788).

The spelling of 13444420357 in words is "thirteen billion, four hundred forty-four million, four hundred twenty thousand, three hundred fifty-seven".