19780327379 has 2 divisors, whose sum is σ = 19780327380. Its totient is φ = 19780327378.

The previous prime is 19780327331. The next prime is 19780327381. The reversal of 19780327379 is 97372308791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19780327379 is a prime.

It is a super-2 number, since 2×19780327379² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 19780327381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19780317379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9890163689 + 9890163690.

It is an arithmetic number, because the mean of its divisors is an integer number (9890163690).

Almost surely, 2^19780327379 is an apocalyptic number.

19780327379 is a deficient number, since it is larger than the sum of its proper divisors (1).

19780327379 is an equidigital number, since it uses as much as digits as its factorization.

19780327379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The spelling of 19780327379 in words is "nineteen billion, seven hundred eighty million, three hundred twenty-seven thousand, three hundred seventy-nine".