20084947 has 2 divisors, whose sum is σ = 20084948. Its totient is φ = 20084946.

The previous prime is 20084929. The next prime is 20084951. The reversal of 20084947 is 74948002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20084947 - 2²³ = 11696339 is a prime.

It is not a weakly prime, because it can be changed into another prime (20084927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042473 + 10042474.

It is an arithmetic number, because the mean of its divisors is an integer number (10042474).

Almost surely, 2^20084947 is an apocalyptic number.

20084947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20084947 is an equidigital number, since it uses as much as digits as its factorization.

20084947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20084947 is about 4481.6232550271. The cubic root of 20084947 is about 271.8255215725.

The spelling of 20084947 in words is "twenty million, eighty-four thousand, nine hundred forty-seven".