20322145 has 8 divisors (see below), whose sum is σ = 24433704. Its totient is φ = 16226304.

The previous prime is 20322131. The next prime is 20322163. The reversal of 20322145 is 54122302.

It can be written as a sum of positive squares in 4 ways, for example, as 81 + 20322064 = 9^2 + 4508^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20322145 - 2⁷ = 20322017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (3054213).

Almost surely, 2^20322145 is an apocalyptic number.

It is an amenable number.

20322145 is a deficient number, since it is larger than the sum of its proper divisors (4111559).

20322145 is an equidigital number, since it uses as much as digits as its factorization.

20322145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7859.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20322145 is about 4508.0089840194. The cubic root of 20322145 is about 272.8913995086.

Adding to 20322145 its reverse (54122302), we get a palindrome (74444447).

The spelling of 20322145 in words is "twenty million, three hundred twenty-two thousand, one hundred forty-five".