2021427647 has 2 divisors, whose sum is σ = 2021427648. Its totient is φ = 2021427646.

The previous prime is 2021427643. The next prime is 2021427659. The reversal of 2021427647 is 7467241202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021427647 - 2² = 2021427643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021427643) 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, 1010713823 + 1010713824.

It is an arithmetic number, because the mean of its divisors is an integer number (1010713824).

Almost surely, 2^2021427647 is an apocalyptic number.

2021427647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021427647 is an equidigital number, since it uses as much as digits as its factorization.

2021427647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 2021427647 is about 44960.2896676612. The cubic root of 2021427647 is about 1264.4045997444.

Adding to 2021427647 its reverse (7467241202), we get a palindrome (9488668849).

The spelling of 2021427647 in words is "two billion, twenty-one million, four hundred twenty-seven thousand, six hundred forty-seven".