18055535905 has 24 divisors (see below), whose sum is σ = 23830613352. Its totient is φ = 13122912000.

The previous prime is 18055535903. The next prime is 18055535951. The reversal of 18055535905 is 50953555081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7114585104 + 10940950801 = 84348^2 + 104599^2 .

It is not a de Polignac number, because 18055535905 - 2¹ = 18055535903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18055535903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1032535 + ... + 1049875.

It is an arithmetic number, because the mean of its divisors is an integer number (992942223).

Almost surely, 2^18055535905 is an apocalyptic number.

It is an amenable number.

18055535905 is a deficient number, since it is larger than the sum of its proper divisors (5775077447).

18055535905 is a wasteful number, since it uses less digits than its factorization.

18055535905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19089 (or 19078 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 18055535905 in words is "eighteen billion, fifty-five million, five hundred thirty-five thousand, nine hundred five".