20325405 has 16 divisors (see below), whose sum is σ = 32632704. Its totient is φ = 10802880.

The previous prime is 20325401. The next prime is 20325443. The reversal of 20325405 is 50452302.

It is not a de Polignac number, because 20325405 - 2² = 20325401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20325401) 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, 2487 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (2039544).

Almost surely, 2^20325405 is an apocalyptic number.

It is an amenable number.

20325405 is a deficient number, since it is larger than the sum of its proper divisors (12307299).

20325405 is a wasteful number, since it uses less digits than its factorization.

20325405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20325405 is about 4508.3705482136. The cubic root of 20325405 is about 272.9059907898.

Adding to 20325405 its reverse (50452302), we get a palindrome (70777707).

The spelling of 20325405 in words is "twenty million, three hundred twenty-five thousand, four hundred five".