20480165 has 4 divisors (see below), whose sum is σ = 24576204. Its totient is φ = 16384128.

The previous prime is 20480137. The next prime is 20480209. The reversal of 20480165 is 56108402.

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 5841889 + 14638276 = 2417^2 + 3826^2 .

It is a cyclic number.

It is not a de Polignac number, because 20480165 - 2⁸ = 20479909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048012 + ... + 2048021.

It is an arithmetic number, because the mean of its divisors is an integer number (6144051).

Almost surely, 2^20480165 is an apocalyptic number.

It is an amenable number.

20480165 is a deficient number, since it is larger than the sum of its proper divisors (4096039).

20480165 is an equidigital number, since it uses as much as digits as its factorization.

20480165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096038.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20480165 is about 4525.5016296539. The cubic root of 20480165 is about 273.5968862216.

Adding to 20480165 its reverse (56108402), we get a palindrome (76588567).

The spelling of 20480165 in words is "twenty million, four hundred eighty thousand, one hundred sixty-five".