20847639301 has 2 divisors, whose sum is σ = 20847639302. Its totient is φ = 20847639300.

The previous prime is 20847639299. The next prime is 20847639311. The reversal of 20847639301 is 10393674802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11375289025 + 9472350276 = 106655^2 + 97326^2 .

It is a cyclic number.

It is not a de Polignac number, because 20847639301 - 2¹ = 20847639299 is a prime.

Together with 20847639299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20847639311) 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, 10423819650 + 10423819651.

It is an arithmetic number, because the mean of its divisors is an integer number (10423819651).

Almost surely, 2^20847639301 is an apocalyptic number.

It is an amenable number.

20847639301 is a deficient number, since it is larger than the sum of its proper divisors (1).

20847639301 is an equidigital number, since it uses as much as digits as its factorization.

20847639301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20847639301 in words is "twenty billion, eight hundred forty-seven million, six hundred thirty-nine thousand, three hundred one".