18535505020 has 24 divisors (see below), whose sum is σ = 38992993200. Its totient is φ = 7401167232.

The previous prime is 18535505017. The next prime is 18535505047. The reversal of 18535505020 is 2050553581.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 803010 + ... + 825769.

It is an arithmetic number, because the mean of its divisors is an integer number (1624708050).

Almost surely, 2^18535505020 is an apocalyptic number.

18535505020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18535505020 is an abundant number, since it is smaller than the sum of its proper divisors (20457488180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18535505020 is a wasteful number, since it uses less digits than its factorization.

18535505020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629357 (or 1629355 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 18535505020 in words is "eighteen billion, five hundred thirty-five million, five hundred five thousand, twenty".