21783191119 has 2 divisors, whose sum is σ = 21783191120. Its totient is φ = 21783191118.

The previous prime is 21783191113. The next prime is 21783191123. The reversal of 21783191119 is 91119138712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21783191119 - 2⁹ = 21783190607 is a prime.

It is a super-2 number, since 2×21783191119² (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 (21783191113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10891595559 + 10891595560.

It is an arithmetic number, because the mean of its divisors is an integer number (10891595560).

Almost surely, 2^21783191119 is an apocalyptic number.

21783191119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21783191119 is an equidigital number, since it uses as much as digits as its factorization.

21783191119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 43.

The spelling of 21783191119 in words is "twenty-one billion, seven hundred eighty-three million, one hundred ninety-one thousand, one hundred nineteen".