21250641460193 has 2 divisors, whose sum is σ = 21250641460194. Its totient is φ = 21250641460192.

The previous prime is 21250641460171. The next prime is 21250641460267. The reversal of 21250641460193 is 39106414605212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16720967800384 + 4529673659809 = 4089128^2 + 2128303^2 .

It is a cyclic number.

It is not a de Polignac number, because 21250641460193 - 2³⁸ = 20975763553249 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250641460393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625320730096 + 10625320730097.

It is an arithmetic number, because the mean of its divisors is an integer number (10625320730097).

Almost surely, 2^{21250641460193} is an apocalyptic number.

It is an amenable number.

21250641460193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250641460193 is an equidigital number, since it uses as much as digits as its factorization.

21250641460193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 21250641460193 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred sixty thousand, one hundred ninety-three".