21304333340203 has 2 divisors, whose sum is σ = 21304333340204. Its totient is φ = 21304333340202.

The previous prime is 21304333340189. The next prime is 21304333340219. The reversal of 21304333340203 is 30204333340312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21304333340203 is a prime.

It is a super-3 number, since 3×21304333340203³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21304333340233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652166670101 + 10652166670102.

It is an arithmetic number, because the mean of its divisors is an integer number (10652166670102).

Almost surely, 2^{21304333340203} is an apocalyptic number.

21304333340203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304333340203 is an equidigital number, since it uses as much as digits as its factorization.

21304333340203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 31.

Adding to 21304333340203 its reverse (30204333340312), we get a palindrome (51508666680515).

The spelling of 21304333340203 in words is "twenty-one trillion, three hundred four billion, three hundred thirty-three million, three hundred forty thousand, two hundred three".