20543305101 has 48 divisors (see below), whose sum is σ = 30575529600. Its totient is φ = 12258449280.

The previous prime is 20543305067. The next prime is 20543305103. The reversal of 20543305101 is 10150334502.

It is not a de Polignac number, because 20543305101 - 2²² = 20539110797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543305103) 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 47 ways as a sum of consecutive naturals, for example, 6606135 + ... + 6609243.

It is an arithmetic number, because the mean of its divisors is an integer number (636990200).

Almost surely, 2^20543305101 is an apocalyptic number.

It is an amenable number.

20543305101 is a deficient number, since it is larger than the sum of its proper divisors (10032224499).

20543305101 is a wasteful number, since it uses less digits than its factorization.

20543305101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 20543305101 its reverse (10150334502), we get a palindrome (30693639603).

The spelling of 20543305101 in words is "twenty billion, five hundred forty-three million, three hundred five thousand, one hundred one".