21455450303207 has 2 divisors, whose sum is σ = 21455450303208. Its totient is φ = 21455450303206.

The previous prime is 21455450303191. The next prime is 21455450303219. The reversal of 21455450303207 is 70230305455412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21455450303207 - 2⁴ = 21455450303191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21455450303227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10727725151603 + 10727725151604.

It is an arithmetic number, because the mean of its divisors is an integer number (10727725151604).

Almost surely, 2^{21455450303207} is an apocalyptic number.

21455450303207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21455450303207 is an equidigital number, since it uses as much as digits as its factorization.

21455450303207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 41.

Adding to 21455450303207 its reverse (70230305455412), we get a palindrome (91685755758619).

The spelling of 21455450303207 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, three hundred three thousand, two hundred seven".