20450104321 has 8 divisors (see below), whose sum is σ = 21664548360. Its totient is φ = 19236937728.

The previous prime is 20450104309. The next prime is 20450104331. The reversal of 20450104321 is 12340105402.

It can be written as a sum of positive squares in 4 ways, for example, as 2751527025 + 17698577296 = 52455^2 + 133036^2 .

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 20450104321 - 2⁵ = 20450104289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20450104292 and 20450104301.

It is not an unprimeable number, because it can be changed into a prime (20450104331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286296 + ... + 350521.

It is an arithmetic number, because the mean of its divisors is an integer number (2708068545).

Almost surely, 2^20450104321 is an apocalyptic number.

It is an amenable number.

20450104321 is a deficient number, since it is larger than the sum of its proper divisors (1214444039).

20450104321 is a wasteful number, since it uses less digits than its factorization.

20450104321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638723.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20450104321 its reverse (12340105402), we get a palindrome (32790209723).

The spelling of 20450104321 in words is "twenty billion, four hundred fifty million, one hundred four thousand, three hundred twenty-one".