20790776719 has 2 divisors, whose sum is σ = 20790776720. Its totient is φ = 20790776718.

The previous prime is 20790776593. The next prime is 20790776749. The reversal of 20790776719 is 91767709702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20790776719 - 2¹³ = 20790768527 is a prime.

It is a super-2 number, since 2×20790776719² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20790776719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20790776749) 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, 10395388359 + 10395388360.

It is an arithmetic number, because the mean of its divisors is an integer number (10395388360).

Almost surely, 2^20790776719 is an apocalyptic number.

20790776719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20790776719 is an equidigital number, since it uses as much as digits as its factorization.

20790776719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2333772, while the sum is 55.

The spelling of 20790776719 in words is "twenty billion, seven hundred ninety million, seven hundred seventy-six thousand, seven hundred nineteen".