20016265 has 4 divisors (see below), whose sum is σ = 24019524. Its totient is φ = 16013008.

The previous prime is 20016263. The next prime is 20016287. The reversal of 20016265 is 56261002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 15776784 = 2059^2 + 3972^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016265 - 2¹ = 20016263 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20016263) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2001622 + ... + 2001631.

It is an arithmetic number, because the mean of its divisors is an integer number (6004881).

Almost surely, 2^20016265 is an apocalyptic number.

It is an amenable number.

20016265 is a deficient number, since it is larger than the sum of its proper divisors (4003259).

20016265 is an equidigital number, since it uses as much as digits as its factorization.

20016265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003258.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20016265 is about 4473.9540677124. The cubic root of 20016265 is about 271.5153250588.

Adding to 20016265 its reverse (56261002), we get a palindrome (76277267).

The spelling of 20016265 in words is "twenty million, sixteen thousand, two hundred sixty-five".