20349394379 has 2 divisors, whose sum is σ = 20349394380. Its totient is φ = 20349394378.

The previous prime is 20349394363. The next prime is 20349394381. The reversal of 20349394379 is 97349394302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20349394379 - 2⁴ = 20349394363 is a prime.

It is a Sophie Germain prime.

Together with 20349394381, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20349394379.

It is not a weakly prime, because it can be changed into another prime (20349394309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174697189 + 10174697190.

It is an arithmetic number, because the mean of its divisors is an integer number (10174697190).

Almost surely, 2^20349394379 is an apocalyptic number.

20349394379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20349394379 is an equidigital number, since it uses as much as digits as its factorization.

20349394379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 53.

The spelling of 20349394379 in words is "twenty billion, three hundred forty-nine million, three hundred ninety-four thousand, three hundred seventy-nine".