20830456879 has 2 divisors, whose sum is σ = 20830456880. Its totient is φ = 20830456878.

The previous prime is 20830456861. The next prime is 20830456883. The reversal of 20830456879 is 97865403802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20830456879 - 2¹¹ = 20830454831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20830456849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10415228439 + 10415228440.

It is an arithmetic number, because the mean of its divisors is an integer number (10415228440).

Almost surely, 2^20830456879 is an apocalyptic number.

20830456879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20830456879 is an equidigital number, since it uses as much as digits as its factorization.

20830456879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 20830456879 in words is "twenty billion, eight hundred thirty million, four hundred fifty-six thousand, eight hundred seventy-nine".