20650345 has 8 divisors (see below), whose sum is σ = 24805440. Its totient is φ = 16503600.

The previous prime is 20650339. The next prime is 20650361. The reversal of 20650345 is 54305602.

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

It is not a de Polignac number, because 20650345 - 2⁹ = 20649833 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 6820 + ... + 9370.

It is an arithmetic number, because the mean of its divisors is an integer number (3100680).

Almost surely, 2^20650345 is an apocalyptic number.

It is an amenable number.

20650345 is a deficient number, since it is larger than the sum of its proper divisors (4155095).

20650345 is a wasteful number, since it uses less digits than its factorization.

20650345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20650345 is about 4544.2650670928. The cubic root of 20650345 is about 274.3526149099.

Adding to 20650345 its reverse (54305602), we get a palindrome (74955947).

The spelling of 20650345 in words is "twenty million, six hundred fifty thousand, three hundred forty-five".