2020647481 has 2 divisors, whose sum is σ = 2020647482. Its totient is φ = 2020647480.

The previous prime is 2020647467. The next prime is 2020647491. The reversal of 2020647481 is 1847460202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1964262400 + 56385081 = 44320^2 + 7509^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020647481 - 2²⁵ = 1987093049 is a prime.

It is a super-2 number, since 2×2020647481² = 8166032484943290722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2020647401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010323740 + 1010323741.

It is an arithmetic number, because the mean of its divisors is an integer number (1010323741).

Almost surely, 2^2020647481 is an apocalyptic number.

It is an amenable number.

2020647481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020647481 is an equidigital number, since it uses as much as digits as its factorization.

2020647481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 2020647481 is about 44951.6126629513. The cubic root of 2020647481 is about 1264.2419139955.

The spelling of 2020647481 in words is "two billion, twenty million, six hundred forty-seven thousand, four hundred eighty-one".