20764904179 has 2 divisors, whose sum is σ = 20764904180. Its totient is φ = 20764904178.

The previous prime is 20764904143. The next prime is 20764904197. The reversal of 20764904179 is 97140946702.

Together with next prime (20764904197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20764904179 - 2¹¹ = 20764902131 is a prime.

It is not a weakly prime, because it can be changed into another prime (20764904119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382452089 + 10382452090.

It is an arithmetic number, because the mean of its divisors is an integer number (10382452090).

Almost surely, 2^20764904179 is an apocalyptic number.

20764904179 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764904179 is an equidigital number, since it uses as much as digits as its factorization.

20764904179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 20764904179 in words is "twenty billion, seven hundred sixty-four million, nine hundred four thousand, one hundred seventy-nine".