20434421323 has 8 divisors (see below), whose sum is σ = 21360362400. Its totient is φ = 19511604288.

The previous prime is 20434421269. The next prime is 20434421417. The reversal of 20434421323 is 32312443402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434421323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20434421291 and 20434421300.

It is not an unprimeable number, because it can be changed into a prime (20434421123) 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 in 7 ways as a sum of consecutive naturals, for example, 767628 + ... + 793801.

It is an arithmetic number, because the mean of its divisors is an integer number (2670045300).

Almost surely, 2^20434421323 is an apocalyptic number.

20434421323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20434421323 is a deficient number, since it is larger than the sum of its proper divisors (925941077).

20434421323 is a wasteful number, since it uses less digits than its factorization.

20434421323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562021.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20434421323 its reverse (32312443402), we get a palindrome (52746864725).

The spelling of 20434421323 in words is "twenty billion, four hundred thirty-four million, four hundred twenty-one thousand, three hundred twenty-three".