20110309979 has 2 divisors, whose sum is σ = 20110309980. Its totient is φ = 20110309978.

The previous prime is 20110309963. The next prime is 20110309981. The reversal of 20110309979 is 97990301102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110309979 - 2⁴ = 20110309963 is a prime.

Together with 20110309981, 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 (20110309909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055154989 + 10055154990.

It is an arithmetic number, because the mean of its divisors is an integer number (10055154990).

Almost surely, 2^20110309979 is an apocalyptic number.

20110309979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110309979 is an equidigital number, since it uses as much as digits as its factorization.

20110309979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The spelling of 20110309979 in words is "twenty billion, one hundred ten million, three hundred nine thousand, nine hundred seventy-nine".