21843227210503 has 2 divisors, whose sum is σ = 21843227210504. Its totient is φ = 21843227210502.

The previous prime is 21843227210489. The next prime is 21843227210527. The reversal of 21843227210503 is 30501272234812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21843227210503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21843227210003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10921613605251 + 10921613605252.

It is an arithmetic number, because the mean of its divisors is an integer number (10921613605252).

Almost surely, 2^{21843227210503} is an apocalyptic number.

21843227210503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21843227210503 is an equidigital number, since it uses as much as digits as its factorization.

21843227210503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 21843227210503 in words is "twenty-one trillion, eight hundred forty-three billion, two hundred twenty-seven million, two hundred ten thousand, five hundred three".