20100220979 has 2 divisors, whose sum is σ = 20100220980. Its totient is φ = 20100220978.

The previous prime is 20100220937. The next prime is 20100221003. The reversal of 20100220979 is 97902200102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100220979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100220279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050110489 + 10050110490.

It is an arithmetic number, because the mean of its divisors is an integer number (10050110490).

Almost surely, 2^20100220979 is an apocalyptic number.

20100220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100220979 is an equidigital number, since it uses as much as digits as its factorization.

20100220979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 20100220979 in words is "twenty billion, one hundred million, two hundred twenty thousand, nine hundred seventy-nine".