20066947 has 2 divisors, whose sum is σ = 20066948. Its totient is φ = 20066946.

The previous prime is 20066941. The next prime is 20066989. The reversal of 20066947 is 74966002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20066947 - 2⁷ = 20066819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20066941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033473 + 10033474.

It is an arithmetic number, because the mean of its divisors is an integer number (10033474).

Almost surely, 2^20066947 is an apocalyptic number.

20066947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066947 is an equidigital number, since it uses as much as digits as its factorization.

20066947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 20066947 is about 4479.6146039587. The cubic root of 20066947 is about 271.7442945426.

The spelling of 20066947 in words is "twenty million, sixty-six thousand, nine hundred forty-seven".