20016697 has 2 divisors, whose sum is σ = 20016698. Its totient is φ = 20016696.

The previous prime is 20016691. The next prime is 20016713. The reversal of 20016697 is 79661002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 89401 = 4464^2 + 299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20016697 is a prime.

It is not a weakly prime, because it can be changed into another prime (20016691) 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, 10008348 + 10008349.

It is an arithmetic number, because the mean of its divisors is an integer number (10008349).

Almost surely, 2^20016697 is an apocalyptic number.

It is an amenable number.

20016697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016697 is an equidigital number, since it uses as much as digits as its factorization.

20016697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20016697 is about 4474.0023468925. The cubic root of 20016697 is about 271.5172783666.

Adding to 20016697 its reverse (79661002), we get a palindrome (99677699).

The spelling of 20016697 in words is "twenty million, sixteen thousand, six hundred ninety-seven".