20976930179 has 2 divisors, whose sum is σ = 20976930180. Its totient is φ = 20976930178.

The previous prime is 20976930167. The next prime is 20976930181. The reversal of 20976930179 is 97103967902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20976930179 is a prime.

It is a Sophie Germain prime.

Together with 20976930181, 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 20976930179.

It is not a weakly prime, because it can be changed into another prime (20976980179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10488465089 + 10488465090.

It is an arithmetic number, because the mean of its divisors is an integer number (10488465090).

Almost surely, 2^20976930179 is an apocalyptic number.

20976930179 is a deficient number, since it is larger than the sum of its proper divisors (1).

20976930179 is an equidigital number, since it uses as much as digits as its factorization.

20976930179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 20976930179 in words is "twenty billion, nine hundred seventy-six million, nine hundred thirty thousand, one hundred seventy-nine".