20580065 has 16 divisors (see below), whose sum is σ = 27029376. Its totient is φ = 14918400.

The previous prime is 20580061. The next prime is 20580067. The reversal of 20580065 is 56008502.

It is not a de Polignac number, because 20580065 - 2² = 20580061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20580061) 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 15 ways as a sum of consecutive naturals, for example, 32300 + ... + 32930.

It is an arithmetic number, because the mean of its divisors is an integer number (1689336).

Almost surely, 2^20580065 is an apocalyptic number.

It is an amenable number.

20580065 is a deficient number, since it is larger than the sum of its proper divisors (6449311).

20580065 is a wasteful number, since it uses less digits than its factorization.

20580065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20580065 is about 4536.5256529640. The cubic root of 20580065 is about 274.0410233922.

Adding to 20580065 its reverse (56008502), we get a palindrome (76588567).

It can be divided in two parts, 20 and 580065, that added together give a palindrome (580085).

The spelling of 20580065 in words is "twenty million, five hundred eighty thousand, sixty-five".