20354110453543 has 4 divisors (see below), whose sum is σ = 20904221546920. Its totient is φ = 19803999360168.

The previous prime is 20354110453531. The next prime is 20354110453559. The reversal of 20354110453543 is 34535401145302.

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 20354110453543 - 2³³ = 20345520518951 is a prime.

It is a super-2 number, since 2×20354110453543² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20354110453496 and 20354110453505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354110450543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275055546633 + ... + 275055546706.

It is an arithmetic number, because the mean of its divisors is an integer number (5226055386730).

Almost surely, 2^{20354110453543} is an apocalyptic number.

20354110453543 is a deficient number, since it is larger than the sum of its proper divisors (550111093377).

20354110453543 is an equidigital number, since it uses as much as digits as its factorization.

20354110453543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550111093376.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 20354110453543 its reverse (34535401145302), we get a palindrome (54889511598845).

The spelling of 20354110453543 in words is "twenty trillion, three hundred fifty-four billion, one hundred ten million, four hundred fifty-three thousand, five hundred forty-three".