20496565 has 8 divisors (see below), whose sum is σ = 25665408. Its totient is φ = 15684240.

The previous prime is 20496563. The next prime is 20496571. The reversal of 20496565 is 56569402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20496565 - 2¹ = 20496563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20496563) 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 7 ways as a sum of consecutive naturals, for example, 89001 + ... + 89230.

It is an arithmetic number, because the mean of its divisors is an integer number (3208176).

Almost surely, 2^20496565 is an apocalyptic number.

It is an amenable number.

20496565 is a deficient number, since it is larger than the sum of its proper divisors (5168843).

20496565 is a wasteful number, since it uses less digits than its factorization.

20496565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178259.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 20496565 is about 4527.3132208850. The cubic root of 20496565 is about 273.6698965672.

It can be divided in two parts, 204 and 96565, that added together give a palindrome (96769).

The spelling of 20496565 in words is "twenty million, four hundred ninety-six thousand, five hundred sixty-five".