20440210321 has 32 divisors (see below), whose sum is σ = 22179329280. Its totient is φ = 18768777216.

The previous prime is 20440210309. The next prime is 20440210327. The reversal of 20440210321 is 12301204402.

It is a cyclic number.

It is not a de Polignac number, because 20440210321 - 2¹⁷ = 20440079249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440210327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56936340 + ... + 56936698.

It is an arithmetic number, because the mean of its divisors is an integer number (693104040).

Almost surely, 2^20440210321 is an apocalyptic number.

It is an amenable number.

20440210321 is a deficient number, since it is larger than the sum of its proper divisors (1739118959).

20440210321 is a wasteful number, since it uses less digits than its factorization.

20440210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20440210321 its reverse (12301204402), we get a palindrome (32741414723).

The spelling of 20440210321 in words is "twenty billion, four hundred forty million, two hundred ten thousand, three hundred twenty-one".