2021245847 has 2 divisors, whose sum is σ = 2021245848. Its totient is φ = 2021245846.

The previous prime is 2021245841. The next prime is 2021245867. The reversal of 2021245847 is 7485421202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021245847 - 2²⁰ = 2020197271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021245841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010622923 + 1010622924.

It is an arithmetic number, because the mean of its divisors is an integer number (1010622924).

Almost surely, 2^2021245847 is an apocalyptic number.

2021245847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021245847 is an equidigital number, since it uses as much as digits as its factorization.

2021245847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 2021245847 is about 44958.2678380740. The cubic root of 2021245847 is about 1264.3666932598.

The spelling of 2021245847 in words is "two billion, twenty-one million, two hundred forty-five thousand, eight hundred forty-seven".