20304421051 has 2 divisors, whose sum is σ = 20304421052. Its totient is φ = 20304421050.

The previous prime is 20304421009. The next prime is 20304421099. The reversal of 20304421051 is 15012440302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20304421051 - 2⁷ = 20304420923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20304451051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10152210525 + 10152210526.

It is an arithmetic number, because the mean of its divisors is an integer number (10152210526).

Almost surely, 2^20304421051 is an apocalyptic number.

20304421051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20304421051 is an equidigital number, since it uses as much as digits as its factorization.

20304421051 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20304421051 its reverse (15012440302), we get a palindrome (35316861353).

The spelling of 20304421051 in words is "twenty billion, three hundred four million, four hundred twenty-one thousand, fifty-one".