20430434359 has 2 divisors, whose sum is σ = 20430434360. Its totient is φ = 20430434358.

The previous prime is 20430434303. The next prime is 20430434363. The reversal of 20430434359 is 95343403402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20430434359 - 2⁹ = 20430433847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20430434659) 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, 10215217179 + 10215217180.

It is an arithmetic number, because the mean of its divisors is an integer number (10215217180).

Almost surely, 2^20430434359 is an apocalyptic number.

20430434359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430434359 is an equidigital number, since it uses as much as digits as its factorization.

20430434359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 37.

It can be divided in two parts, 2043043 and 4359, that added together give a palindrome (2047402).

The spelling of 20430434359 in words is "twenty billion, four hundred thirty million, four hundred thirty-four thousand, three hundred fifty-nine".