20555441543 has 32 divisors (see below), whose sum is σ = 26169360000. Its totient is φ = 16040602368.

The previous prime is 20555441539. The next prime is 20555441579. The reversal of 20555441543 is 34514455502.

It is not a de Polignac number, because 20555441543 - 2² = 20555441539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20555441497 and 20555441506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555441243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293933 + ... + 357081.

It is an arithmetic number, because the mean of its divisors is an integer number (817792500).

Almost surely, 2^20555441543 is an apocalyptic number.

20555441543 is a deficient number, since it is larger than the sum of its proper divisors (5613918457).

20555441543 is an equidigital number, since it uses as much as digits as its factorization.

20555441543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63256 (or 63242 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 20555441543 in words is "twenty billion, five hundred fifty-five million, four hundred forty-one thousand, five hundred forty-three".