20005541533 has 4 divisors (see below), whose sum is σ = 20006326080. Its totient is φ = 20004756988.

The previous prime is 20005541513. The next prime is 20005541551. The reversal of 20005541533 is 33514550002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20005541533 - 2²¹ = 20003444381 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 (20005541513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352693 + ... + 405466.

It is an arithmetic number, because the mean of its divisors is an integer number (5001581520).

Almost surely, 2^20005541533 is an apocalyptic number.

It is an amenable number.

20005541533 is a deficient number, since it is larger than the sum of its proper divisors (784547).

20005541533 is an equidigital number, since it uses as much as digits as its factorization.

20005541533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784546.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 20005541533 in words is "twenty billion, five million, five hundred forty-one thousand, five hundred thirty-three".