20813362789 has 2 divisors, whose sum is σ = 20813362790. Its totient is φ = 20813362788.

The previous prime is 20813362783. The next prime is 20813362849. The reversal of 20813362789 is 98726331802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14474496100 + 6338866689 = 120310^2 + 79617^2 .

It is a cyclic number.

It is not a de Polignac number, because 20813362789 - 2⁹ = 20813362277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20813362783) 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, 10406681394 + 10406681395.

It is an arithmetic number, because the mean of its divisors is an integer number (10406681395).

Almost surely, 2^20813362789 is an apocalyptic number.

It is an amenable number.

20813362789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20813362789 is an equidigital number, since it uses as much as digits as its factorization.

20813362789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 20813362789 in words is "twenty billion, eight hundred thirteen million, three hundred sixty-two thousand, seven hundred eighty-nine".