20404321001 has 2 divisors, whose sum is σ = 20404321002. Its totient is φ = 20404321000.

The previous prime is 20404320971. The next prime is 20404321051. The reversal of 20404321001 is 10012340402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20401837225 + 2483776 = 142835^2 + 1576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20404321001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404321051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202160500 + 10202160501.

It is an arithmetic number, because the mean of its divisors is an integer number (10202160501).

Almost surely, 2^20404321001 is an apocalyptic number.

It is an amenable number.

20404321001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404321001 is an equidigital number, since it uses as much as digits as its factorization.

20404321001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20404321001 its reverse (10012340402), we get a palindrome (30416661403).

The spelling of 20404321001 in words is "twenty billion, four hundred four million, three hundred twenty-one thousand, one".