21214054193 has 2 divisors, whose sum is σ = 21214054194. Its totient is φ = 21214054192.

The previous prime is 21214054181. The next prime is 21214054273. The reversal of 21214054193 is 39145041212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14857659664 + 6356394529 = 121892^2 + 79727^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214054193 - 2¹⁶ = 21213988657 is a prime.

It is not a weakly prime, because it can be changed into another prime (21214054793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607027096 + 10607027097.

It is an arithmetic number, because the mean of its divisors is an integer number (10607027097).

Almost surely, 2^21214054193 is an apocalyptic number.

It is an amenable number.

21214054193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214054193 is an equidigital number, since it uses as much as digits as its factorization.

21214054193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21214054193 in words is "twenty-one billion, two hundred fourteen million, fifty-four thousand, one hundred ninety-three".