20535210087 has 16 divisors (see below), whose sum is σ = 31293752832. Its totient is φ = 11733654240.

The previous prime is 20535210079. The next prime is 20535210173. The reversal of 20535210087 is 78001253502.

It is not a de Polignac number, because 20535210087 - 2³ = 20535210079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535210067) 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, 606613 + ... + 639569.

It is an arithmetic number, because the mean of its divisors is an integer number (1955859552).

Almost surely, 2^20535210087 is an apocalyptic number.

20535210087 is a deficient number, since it is larger than the sum of its proper divisors (10758542745).

20535210087 is a wasteful number, since it uses less digits than its factorization.

20535210087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62638.

The product of its (nonzero) digits is 16800, while the sum is 33.

Adding to 20535210087 its reverse (78001253502), we get a palindrome (98536463589).

The spelling of 20535210087 in words is "twenty billion, five hundred thirty-five million, two hundred ten thousand, eighty-seven".