20205534543 has 8 divisors (see below), whose sum is σ = 26941617456. Its totient is φ = 13469904000.

The previous prime is 20205534539. The next prime is 20205534589. The reversal of 20205534543 is 34543550202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20205534543 - 2² = 20205534539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205536543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10393 + ... + 201293.

It is an arithmetic number, because the mean of its divisors is an integer number (3367702182).

Almost surely, 2^20205534543 is an apocalyptic number.

20205534543 is a deficient number, since it is larger than the sum of its proper divisors (6736082913).

20205534543 is a wasteful number, since it uses less digits than its factorization.

20205534543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226185.

The product of its (nonzero) digits is 72000, while the sum is 33.

The spelling of 20205534543 in words is "twenty billion, two hundred five million, five hundred thirty-four thousand, five hundred forty-three".