20305015433 has 2 divisors, whose sum is σ = 20305015434. Its totient is φ = 20305015432.

The previous prime is 20305015427. The next prime is 20305015459. The reversal of 20305015433 is 33451050302.

It is an a-pointer prime, because the next prime (20305015459) can be obtained adding 20305015433 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20304255049 + 760384 = 142493^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 20305015433 - 2¹⁶ = 20304949897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20305015483) 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 as a sum of consecutive naturals, namely, 10152507716 + 10152507717.

It is an arithmetic number, because the mean of its divisors is an integer number (10152507717).

Almost surely, 2^20305015433 is an apocalyptic number.

It is an amenable number.

20305015433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20305015433 is an equidigital number, since it uses as much as digits as its factorization.

20305015433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20305015433 its reverse (33451050302), we get a palindrome (53756065735).

The spelling of 20305015433 in words is "twenty billion, three hundred five million, fifteen thousand, four hundred thirty-three".