20555035535 has 4 divisors (see below), whose sum is σ = 24666042648. Its totient is φ = 16444028424.

The previous prime is 20555035499. The next prime is 20555035549. The reversal of 20555035535 is 53553055502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20555035535 - 2⁸ = 20555035279 is a prime.

It is a super-2 number, since 2×20555035535² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 2055503549 + ... + 2055503558.

It is an arithmetic number, because the mean of its divisors is an integer number (6166510662).

Almost surely, 2^20555035535 is an apocalyptic number.

20555035535 is a deficient number, since it is larger than the sum of its proper divisors (4111007113).

20555035535 is an equidigital number, since it uses as much as digits as its factorization.

20555035535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111007112.

The product of its (nonzero) digits is 281250, while the sum is 38.

The spelling of 20555035535 in words is "twenty billion, five hundred fifty-five million, thirty-five thousand, five hundred thirty-five".