20505322 has 8 divisors (see below), whose sum is σ = 31750272. Its totient is φ = 9921900.

The previous prime is 20505307. The next prime is 20505341. The reversal of 20505322 is 22350502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20505322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165304 + ... + 165427.

It is an arithmetic number, because the mean of its divisors is an integer number (3968784).

Almost surely, 2^20505322 is an apocalyptic number.

20505322 is a deficient number, since it is larger than the sum of its proper divisors (11244950).

20505322 is a wasteful number, since it uses less digits than its factorization.

20505322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330764.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20505322 is about 4528.2802475112. The cubic root of 20505322 is about 273.7088654720.

Adding to 20505322 its reverse (22350502), we get a palindrome (42855824).

The spelling of 20505322 in words is "twenty million, five hundred five thousand, three hundred twenty-two".