20116331779 has 2 divisors, whose sum is σ = 20116331780. Its totient is φ = 20116331778.

The previous prime is 20116331771. The next prime is 20116331813. The reversal of 20116331779 is 97713361102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20116331779 - 2³ = 20116331771 is a prime.

It is not a weakly prime, because it can be changed into another prime (20116331771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058165889 + 10058165890.

It is an arithmetic number, because the mean of its divisors is an integer number (10058165890).

Almost surely, 2^20116331779 is an apocalyptic number.

20116331779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116331779 is an equidigital number, since it uses as much as digits as its factorization.

20116331779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 40.

The spelling of 20116331779 in words is "twenty billion, one hundred sixteen million, three hundred thirty-one thousand, seven hundred seventy-nine".