20354222123 has 4 divisors (see below), whose sum is σ = 20489018448. Its totient is φ = 20219425800.

The previous prime is 20354222113. The next prime is 20354222143. The reversal of 20354222123 is 32122245302.

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 20354222123 - 2¹⁸ = 20353959979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20354222092 and 20354222101.

It is not an unprimeable number, because it can be changed into a prime (20354222113) 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 3 ways as a sum of consecutive naturals, for example, 67397936 + ... + 67398237.

It is an arithmetic number, because the mean of its divisors is an integer number (5122254612).

Almost surely, 2^20354222123 is an apocalyptic number.

20354222123 is a deficient number, since it is larger than the sum of its proper divisors (134796325).

20354222123 is a wasteful number, since it uses less digits than its factorization.

20354222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134796324.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20354222123 its reverse (32122245302), we get a palindrome (52476467425).

The spelling of 20354222123 in words is "twenty billion, three hundred fifty-four million, two hundred twenty-two thousand, one hundred twenty-three".