21204341003 has 2 divisors, whose sum is σ = 21204341004. Its totient is φ = 21204341002.

The previous prime is 21204340957. The next prime is 21204341021. The reversal of 21204341003 is 30014340212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21204341003 - 2¹⁶ = 21204275467 is a prime.

It is not a weakly prime, because it can be changed into another prime (21204341023) 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, 10602170501 + 10602170502.

It is an arithmetic number, because the mean of its divisors is an integer number (10602170502).

Almost surely, 2^21204341003 is an apocalyptic number.

21204341003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21204341003 is an equidigital number, since it uses as much as digits as its factorization.

21204341003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21204341003 its reverse (30014340212), we get a palindrome (51218681215).

The spelling of 21204341003 in words is "twenty-one billion, two hundred four million, three hundred forty-one thousand, three".