20205054543 has 32 divisors (see below), whose sum is σ = 28244865024. Its totient is φ = 12831840000.

The previous prime is 20205054517. The next prime is 20205054547. The reversal of 20205054543 is 34545050202.

It is not a de Polignac number, because 20205054543 - 2²⁹ = 19668183631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20205054543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205054547) 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, 5022873 + ... + 5026893.

It is an arithmetic number, because the mean of its divisors is an integer number (882652032).

Almost surely, 2^20205054543 is an apocalyptic number.

20205054543 is a deficient number, since it is larger than the sum of its proper divisors (8039810481).

20205054543 is a wasteful number, since it uses less digits than its factorization.

20205054543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887.

The product of its (nonzero) digits is 24000, while the sum is 30.

The spelling of 20205054543 in words is "twenty billion, two hundred five million, fifty-four thousand, five hundred forty-three".