20768818051 has 2 divisors, whose sum is σ = 20768818052. Its totient is φ = 20768818050.

The previous prime is 20768818027. The next prime is 20768818073. The reversal of 20768818051 is 15081886702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20768818051 - 2⁹ = 20768817539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20768817992 and 20768818010.

It is not a weakly prime, because it can be changed into another prime (20768818351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384409025 + 10384409026.

It is an arithmetic number, because the mean of its divisors is an integer number (10384409026).

Almost surely, 2^20768818051 is an apocalyptic number.

20768818051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20768818051 is an equidigital number, since it uses as much as digits as its factorization.

20768818051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 20768818051 in words is "twenty billion, seven hundred sixty-eight million, eight hundred eighteen thousand, fifty-one".