18605744205 has 16 divisors (see below), whose sum is σ = 31335990720. Its totient is φ = 9400796928.

The previous prime is 18605744203. The next prime is 18605744251. The reversal of 18605744205 is 50244750681.

It is a happy number.

It is not a de Polignac number, because 18605744205 - 2¹ = 18605744203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18605744203) 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, 32641372 + ... + 32641941.

It is an arithmetic number, because the mean of its divisors is an integer number (1958499420).

Almost surely, 2^18605744205 is an apocalyptic number.

18605744205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18605744205 is a deficient number, since it is larger than the sum of its proper divisors (12730246515).

18605744205 is a wasteful number, since it uses less digits than its factorization.

18605744205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65283340.

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 18605744205 in words is "eighteen billion, six hundred five million, seven hundred forty-four thousand, two hundred five".