20543454511 has 8 divisors (see below), whose sum is σ = 21239250048. Its totient is φ = 19849728000.

The previous prime is 20543454509. The next prime is 20543454521. The reversal of 20543454511 is 11545434502.

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

It is a cyclic number.

It is not a de Polignac number, because 20543454511 - 2¹ = 20543454509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543454521) 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 7 ways as a sum of consecutive naturals, for example, 497050 + ... + 536791.

It is an arithmetic number, because the mean of its divisors is an integer number (2654906256).

Almost surely, 2^20543454511 is an apocalyptic number.

20543454511 is a deficient number, since it is larger than the sum of its proper divisors (695795537).

20543454511 is a wasteful number, since it uses less digits than its factorization.

20543454511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034513.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20543454511 in words is "twenty billion, five hundred forty-three million, four hundred fifty-four thousand, five hundred eleven".