20016947 has 2 divisors, whose sum is σ = 20016948. Its totient is φ = 20016946.

The previous prime is 20016943. The next prime is 20016961. The reversal of 20016947 is 74961002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20016947 - 2² = 20016943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20016943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008473 + 10008474.

It is an arithmetic number, because the mean of its divisors is an integer number (10008474).

Almost surely, 2^20016947 is an apocalyptic number.

20016947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016947 is an equidigital number, since it uses as much as digits as its factorization.

20016947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20016947 is about 4474.0302859949. The cubic root of 20016947 is about 271.5184087402.

Adding to 20016947 its reverse (74961002), we get a palindrome (94977949).

The spelling of 20016947 in words is "twenty million, sixteen thousand, nine hundred forty-seven".