20434414123 has 4 divisors (see below), whose sum is σ = 20513925720. Its totient is φ = 20354902528.

The previous prime is 20434414081. The next prime is 20434414141. The reversal of 20434414123 is 32141443402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20434414123 - 2²⁵ = 20400859691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20434414091 and 20434414100.

It is not an unprimeable number, because it can be changed into a prime (20434414153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39755413 + ... + 39755926.

It is an arithmetic number, because the mean of its divisors is an integer number (5128481430).

Almost surely, 2^20434414123 is an apocalyptic number.

20434414123 is a deficient number, since it is larger than the sum of its proper divisors (79511597).

20434414123 is an equidigital number, since it uses as much as digits as its factorization.

20434414123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79511596.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20434414123 its reverse (32141443402), we get a palindrome (52575857525).

The spelling of 20434414123 in words is "twenty billion, four hundred thirty-four million, four hundred fourteen thousand, one hundred twenty-three".