21286196293 has 2 divisors, whose sum is σ = 21286196294. Its totient is φ = 21286196292.

The previous prime is 21286196249. The next prime is 21286196329. The reversal of 21286196293 is 39269168212.

Together with next prime (21286196329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17994076164 + 3292120129 = 134142^2 + 57377^2 .

It is a cyclic number.

It is not a de Polignac number, because 21286196293 - 2³³ = 12696261701 is a prime.

It is a super-3 number, since 3×21286196293³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21286196093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10643098146 + 10643098147.

It is an arithmetic number, because the mean of its divisors is an integer number (10643098147).

Almost surely, 2^21286196293 is an apocalyptic number.

It is an amenable number.

21286196293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21286196293 is an equidigital number, since it uses as much as digits as its factorization.

21286196293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The spelling of 21286196293 in words is "twenty-one billion, two hundred eighty-six million, one hundred ninety-six thousand, two hundred ninety-three".