20325505 has 16 divisors (see below), whose sum is σ = 25069824. Its totient is φ = 15814080.

The previous prime is 20325493. The next prime is 20325511. The reversal of 20325505 is 50552302.

It is not a de Polignac number, because 20325505 - 2¹⁵ = 20292737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31092 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (1566864).

Almost surely, 2^20325505 is an apocalyptic number.

It is an amenable number.

20325505 is a deficient number, since it is larger than the sum of its proper divisors (4744319).

20325505 is a wasteful number, since it uses less digits than its factorization.

20325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20325505 is about 4508.3816386814. The cubic root of 20325505 is about 272.9064383505.

Adding to 20325505 its reverse (50552302), we get a palindrome (70877807).

The spelling of 20325505 in words is "twenty million, three hundred twenty-five thousand, five hundred five".