20205042533 has 16 divisors (see below), whose sum is σ = 22199847936. Its totient is φ = 18276096960.

The previous prime is 20205042497. The next prime is 20205042541. The reversal of 20205042533 is 33524050202.

It is a cyclic number.

It is not a de Polignac number, because 20205042533 - 2²⁸ = 19936607077 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 (20205042733) 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 15 ways as a sum of consecutive naturals, for example, 105635 + ... + 227087.

It is an arithmetic number, because the mean of its divisors is an integer number (1387490496).

Almost surely, 2^20205042533 is an apocalyptic number.

It is an amenable number.

20205042533 is a deficient number, since it is larger than the sum of its proper divisors (1994805403).

20205042533 is a wasteful number, since it uses less digits than its factorization.

20205042533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121724.

The product of its (nonzero) digits is 7200, while the sum is 26.

Adding to 20205042533 its reverse (33524050202), we get a palindrome (53729092735).

The spelling of 20205042533 in words is "twenty billion, two hundred five million, forty-two thousand, five hundred thirty-three".