21413300197 has 2 divisors, whose sum is σ = 21413300198. Its totient is φ = 21413300196.

The previous prime is 21413300177. The next prime is 21413300239. The reversal of 21413300197 is 79100331412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21325052961 + 88247236 = 146031^2 + 9394^2 .

It is a cyclic number.

It is not a de Polignac number, because 21413300197 - 2¹⁵ = 21413267429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21413300177) 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, 10706650098 + 10706650099.

It is an arithmetic number, because the mean of its divisors is an integer number (10706650099).

Almost surely, 2^21413300197 is an apocalyptic number.

It is an amenable number.

21413300197 is a deficient number, since it is larger than the sum of its proper divisors (1).

21413300197 is an equidigital number, since it uses as much as digits as its factorization.

21413300197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 21413300197 in words is "twenty-one billion, four hundred thirteen million, three hundred thousand, one hundred ninety-seven".