21200300204393 has 2 divisors, whose sum is σ = 21200300204394. Its totient is φ = 21200300204392.

The previous prime is 21200300204371. The next prime is 21200300204581. The reversal of 21200300204393 is 39340200300212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20815201767424 + 385098436969 = 4562368^2 + 620563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200300204393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200300204893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600150102196 + 10600150102197.

It is an arithmetic number, because the mean of its divisors is an integer number (10600150102197).

Almost surely, 2^{21200300204393} is an apocalyptic number.

It is an amenable number.

21200300204393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200300204393 is an equidigital number, since it uses as much as digits as its factorization.

21200300204393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 21200300204393 in words is "twenty-one trillion, two hundred billion, three hundred million, two hundred four thousand, three hundred ninety-three".