20786288461 has 2 divisors, whose sum is σ = 20786288462. Its totient is φ = 20786288460.

The previous prime is 20786288441. The next prime is 20786288503. The reversal of 20786288461 is 16488268702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20137312836 + 648975625 = 141906^2 + 25475^2 .

It is a cyclic number.

It is not a de Polignac number, because 20786288461 - 2⁷ = 20786288333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20786288399 and 20786288408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20786288441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10393144230 + 10393144231.

It is an arithmetic number, because the mean of its divisors is an integer number (10393144231).

Almost surely, 2^20786288461 is an apocalyptic number.

It is an amenable number.

20786288461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20786288461 is an equidigital number, since it uses as much as digits as its factorization.

20786288461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 20786288461 in words is "twenty billion, seven hundred eighty-six million, two hundred eighty-eight thousand, four hundred sixty-one".