20205213535 has 32 divisors (see below), whose sum is σ = 27270512640. Its totient is φ = 14259535488.

The previous prime is 20205213503. The next prime is 20205213557. The reversal of 20205213535 is 53531250202.

It is a cyclic number.

It is not a de Polignac number, because 20205213535 - 2⁵ = 20205213503 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1906822 + ... + 1917388.

It is an arithmetic number, because the mean of its divisors is an integer number (852203520).

Almost surely, 2^20205213535 is an apocalyptic number.

20205213535 is a deficient number, since it is larger than the sum of its proper divisors (7065299105).

20205213535 is a wasteful number, since it uses less digits than its factorization.

20205213535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11887.

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

Adding to 20205213535 its reverse (53531250202), we get a palindrome (73736463737).

The spelling of 20205213535 in words is "twenty billion, two hundred five million, two hundred thirteen thousand, five hundred thirty-five".