20446773287 has 2 divisors, whose sum is σ = 20446773288. Its totient is φ = 20446773286.

The previous prime is 20446773283. The next prime is 20446773337. The reversal of 20446773287 is 78237764402.

It is an a-pointer prime, because the next prime (20446773337) can be obtained adding 20446773287 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20446773287 - 2² = 20446773283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20446773283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223386643 + 10223386644.

It is an arithmetic number, because the mean of its divisors is an integer number (10223386644).

Almost surely, 2^20446773287 is an apocalyptic number.

20446773287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20446773287 is an equidigital number, since it uses as much as digits as its factorization.

20446773287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 50.

The spelling of 20446773287 in words is "twenty billion, four hundred forty-six million, seven hundred seventy-three thousand, two hundred eighty-seven".