18535518705 has 48 divisors (see below), whose sum is σ = 33479151552. Its totient is φ = 8743996800.

The previous prime is 18535518623. The next prime is 18535518713. The reversal of 18535518705 is 50781553581.

It is not a de Polignac number, because 18535518705 - 2¹⁰ = 18535517681 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70851 + ... + 205160.

It is an arithmetic number, because the mean of its divisors is an integer number (697482324).

Almost surely, 2^18535518705 is an apocalyptic number.

18535518705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18535518705 is a deficient number, since it is larger than the sum of its proper divisors (14943632847).

18535518705 is a wasteful number, since it uses less digits than its factorization.

18535518705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276078 (or 276067 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 48.

The spelling of 18535518705 in words is "eighteen billion, five hundred thirty-five million, five hundred eighteen thousand, seven hundred five".