20022402321 has 6 divisors (see below), whose sum is σ = 28921247810. Its totient is φ = 13348268208.

The previous prime is 20022402299. The next prime is 20022402353. The reversal of 20022402321 is 12320422002.

It can be written as a sum of positive squares in only one way, i.e., 13552452225 + 6469950096 = 116415^2 + 80436^2 .

It is not a de Polignac number, because 20022402321 - 2⁵ = 20022402289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022402294 and 20022402303.

It is not an unprimeable number, because it can be changed into a prime (20022402371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112355676 + ... + 1112355693.

Almost surely, 2^20022402321 is an apocalyptic number.

It is an amenable number.

20022402321 is a deficient number, since it is larger than the sum of its proper divisors (8898845489).

20022402321 is a wasteful number, since it uses less digits than its factorization.

20022402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224711375 (or 2224711372 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20022402321 its reverse (12320422002), we get a palindrome (32342824323).

The spelling of 20022402321 in words is "twenty billion, twenty-two million, four hundred two thousand, three hundred twenty-one".