21430304444287 has 2 divisors, whose sum is σ = 21430304444288. Its totient is φ = 21430304444286.

The previous prime is 21430304444201. The next prime is 21430304444299. The reversal of 21430304444287 is 78244440303412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21430304444287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430304447287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715152222143 + 10715152222144.

It is an arithmetic number, because the mean of its divisors is an integer number (10715152222144).

Almost surely, 2^{21430304444287} is an apocalyptic number.

21430304444287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430304444287 is an equidigital number, since it uses as much as digits as its factorization.

21430304444287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 46.

Adding to 21430304444287 its reverse (78244440303412), we get a palindrome (99674744747699).

The spelling of 21430304444287 in words is "twenty-one trillion, four hundred thirty billion, three hundred four million, four hundred forty-four thousand, two hundred eighty-seven".