20826650287 has 2 divisors, whose sum is σ = 20826650288. Its totient is φ = 20826650286.

The previous prime is 20826650281. The next prime is 20826650389. The reversal of 20826650287 is 78205662802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20826650287 - 2²³ = 20818261679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20826650281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10413325143 + 10413325144.

It is an arithmetic number, because the mean of its divisors is an integer number (10413325144).

Almost surely, 2^20826650287 is an apocalyptic number.

20826650287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20826650287 is an equidigital number, since it uses as much as digits as its factorization.

20826650287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 20826650287 in words is "twenty billion, eight hundred twenty-six million, six hundred fifty thousand, two hundred eighty-seven".