20003455321 has 2 divisors, whose sum is σ = 20003455322. Its totient is φ = 20003455320.

The previous prime is 20003455301. The next prime is 20003455337. The reversal of 20003455321 is 12355430002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18031118400 + 1972336921 = 134280^2 + 44411^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003455321 - 2¹¹ = 20003453273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20003455301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001727660 + 10001727661.

It is an arithmetic number, because the mean of its divisors is an integer number (10001727661).

Almost surely, 2^20003455321 is an apocalyptic number.

It is an amenable number.

20003455321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003455321 is an equidigital number, since it uses as much as digits as its factorization.

20003455321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20003455321 its reverse (12355430002), we get a palindrome (32358885323).

The spelling of 20003455321 in words is "twenty billion, three million, four hundred fifty-five thousand, three hundred twenty-one".