20620327979 has 2 divisors, whose sum is σ = 20620327980. Its totient is φ = 20620327978.

The previous prime is 20620327933. The next prime is 20620328077. The reversal of 20620327979 is 97972302602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20620327979 - 2⁸ = 20620327723 is a prime.

It is not a weakly prime, because it can be changed into another prime (20620327919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310163989 + 10310163990.

It is an arithmetic number, because the mean of its divisors is an integer number (10310163990).

Almost surely, 2^20620327979 is an apocalyptic number.

20620327979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620327979 is an equidigital number, since it uses as much as digits as its factorization.

20620327979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 20620327979 in words is "twenty billion, six hundred twenty million, three hundred twenty-seven thousand, nine hundred seventy-nine".