20016705 has 16 divisors (see below), whose sum is σ = 32082624. Its totient is φ = 10656960.

The previous prime is 20016697. The next prime is 20016713. The reversal of 20016705 is 50761002.

It is an interprime number because it is at equal distance from previous prime (20016697) and next prime (20016713).

It is not a de Polignac number, because 20016705 - 2³ = 20016697 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 14662 + ... + 15968.

It is an arithmetic number, because the mean of its divisors is an integer number (2005164).

Almost surely, 2^20016705 is an apocalyptic number.

It is an amenable number.

20016705 is a deficient number, since it is larger than the sum of its proper divisors (12065919).

20016705 is a wasteful number, since it uses less digits than its factorization.

20016705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20016705 is about 4474.0032409465. The cubic root of 20016705 is about 271.5173145387.

Adding to 20016705 its reverse (50761002), we get a palindrome (70777707).

The spelling of 20016705 in words is "twenty million, sixteen thousand, seven hundred five".