20471963 has 2 divisors, whose sum is σ = 20471964. Its totient is φ = 20471962.

The previous prime is 20471951. The next prime is 20471977. The reversal of 20471963 is 36917402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20471963 - 2¹⁰ = 20470939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20471923) 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, 10235981 + 10235982.

It is an arithmetic number, because the mean of its divisors is an integer number (10235982).

Almost surely, 2^20471963 is an apocalyptic number.

20471963 is a deficient number, since it is larger than the sum of its proper divisors (1).

20471963 is an equidigital number, since it uses as much as digits as its factorization.

20471963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20471963 is about 4524.5953410222. The cubic root of 20471963 is about 273.5603575234.

The spelling of 20471963 in words is "twenty million, four hundred seventy-one thousand, nine hundred sixty-three".