20434311433 has 2 divisors, whose sum is σ = 20434311434. Its totient is φ = 20434311432.

The previous prime is 20434311421. The next prime is 20434311437. The reversal of 20434311433 is 33411343402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17734781584 + 2699529849 = 133172^2 + 51957^2 .

It is a cyclic number.

It is not a de Polignac number, because 20434311433 - 2⁹ = 20434310921 is a prime.

It is a super-2 number, since 2×20434311433² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20434311437) 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, 10217155716 + 10217155717.

It is an arithmetic number, because the mean of its divisors is an integer number (10217155717).

Almost surely, 2^20434311433 is an apocalyptic number.

It is an amenable number.

20434311433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434311433 is an equidigital number, since it uses as much as digits as its factorization.

20434311433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 20434311433 its reverse (33411343402), we get a palindrome (53845654835).

The spelling of 20434311433 in words is "twenty billion, four hundred thirty-four million, three hundred eleven thousand, four hundred thirty-three".