20573647 has 2 divisors, whose sum is σ = 20573648. Its totient is φ = 20573646.

The previous prime is 20573633. The next prime is 20573669. The reversal of 20573647 is 74637502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20573647 - 2¹¹ = 20571599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20573627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286823 + 10286824.

It is an arithmetic number, because the mean of its divisors is an integer number (10286824).

Almost surely, 2^20573647 is an apocalyptic number.

20573647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20573647 is an equidigital number, since it uses as much as digits as its factorization.

20573647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20573647 is about 4535.8182282803. The cubic root of 20573647 is about 274.0125333923.

The spelling of 20573647 in words is "twenty million, five hundred seventy-three thousand, six hundred forty-seven".