20204535 has 16 divisors (see below), whose sum is σ = 34814304. Its totient is φ = 9946752.

The previous prime is 20204533. The next prime is 20204563. The reversal of 20204535 is 53540202.

It is not a de Polignac number, because 20204535 - 2¹ = 20204533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51612 + ... + 52001.

It is an arithmetic number, because the mean of its divisors is an integer number (2175894).

Almost surely, 2^20204535 is an apocalyptic number.

20204535 is a deficient number, since it is larger than the sum of its proper divisors (14609769).

20204535 is a wasteful number, since it uses less digits than its factorization.

20204535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103634.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20204535 is about 4494.9454946640. The cubic root of 20204535 is about 272.3639474583.

Adding to 20204535 its reverse (53540202), we get a palindrome (73744737).

It can be divided in two parts, 2020 and 4535, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 20204535 in words is "twenty million, two hundred four thousand, five hundred thirty-five".