20546947 has 2 divisors, whose sum is σ = 20546948. Its totient is φ = 20546946.

The previous prime is 20546941. The next prime is 20546959. The reversal of 20546947 is 74964502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20546947 - 2¹¹ = 20544899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20546941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273473 + 10273474.

It is an arithmetic number, because the mean of its divisors is an integer number (10273474).

Almost surely, 2^20546947 is an apocalyptic number.

20546947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20546947 is an equidigital number, since it uses as much as digits as its factorization.

20546947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20546947 is about 4532.8740331053. The cubic root of 20546947 is about 273.8939463826.

The spelling of 20546947 in words is "twenty million, five hundred forty-six thousand, nine hundred forty-seven".