21943767319 has 2 divisors, whose sum is σ = 21943767320. Its totient is φ = 21943767318.

The previous prime is 21943767283. The next prime is 21943767367. The reversal of 21943767319 is 91376734912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21943767319 - 2⁹ = 21943766807 is a prime.

It is a super-2 number, since 2×21943767319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21943767919) 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, 10971883659 + 10971883660.

It is an arithmetic number, because the mean of its divisors is an integer number (10971883660).

Almost surely, 2^21943767319 is an apocalyptic number.

21943767319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21943767319 is an equidigital number, since it uses as much as digits as its factorization.

21943767319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 52.

The spelling of 21943767319 in words is "twenty-one billion, nine hundred forty-three million, seven hundred sixty-seven thousand, three hundred nineteen".