20434344023 has 4 divisors (see below), whose sum is σ = 20434665720. Its totient is φ = 20434022328.

The previous prime is 20434344017. The next prime is 20434344041. The reversal of 20434344023 is 32044343402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32044343402 = 2 ⋅16022171701.

It is a cyclic number.

It is not a de Polignac number, because 20434344023 - 2⁶ = 20434343959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434344223) 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 in 3 ways as a sum of consecutive naturals, for example, 30188 + ... + 204401.

It is an arithmetic number, because the mean of its divisors is an integer number (5108666430).

Almost surely, 2^20434344023 is an apocalyptic number.

20434344023 is a deficient number, since it is larger than the sum of its proper divisors (321697).

20434344023 is an equidigital number, since it uses as much as digits as its factorization.

20434344023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321696.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 20434344023 its reverse (32044343402), we get a palindrome (52478687425).

The spelling of 20434344023 in words is "twenty billion, four hundred thirty-four million, three hundred forty-four thousand, twenty-three".