19782323279 has 2 divisors, whose sum is σ = 19782323280. Its totient is φ = 19782323278.

The previous prime is 19782323251. The next prime is 19782323303. The reversal of 19782323279 is 97232328791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19782323279 - 2²⁰ = 19781274703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19782323279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19782323179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9891161639 + 9891161640.

It is an arithmetic number, because the mean of its divisors is an integer number (9891161640).

Almost surely, 2^19782323279 is an apocalyptic number.

19782323279 is a deficient number, since it is larger than the sum of its proper divisors (1).

19782323279 is an equidigital number, since it uses as much as digits as its factorization.

19782323279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The spelling of 19782323279 in words is "nineteen billion, seven hundred eighty-two million, three hundred twenty-three thousand, two hundred seventy-nine".